{"title":"BTKUSA","description":null,"products":[{"product_id":"btk-dual-differential-mount-g80m3-g82m4-g87m2-s58","title":"BTKUSA Dual Differential Mount G8X\/S58","description":"\u003cp\u003e\u003cstrong\u003eMade in San Clemente, CA 🇺🇸\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eAll hardware for assembly included.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHaving trouble checking out here? You can also purchase at \u003ca href=\"https:\/\/builttokillusa.com\"\u003ebuilttokillusa.com\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cspan\u003eBuiltToKillUSA Dual Differential Mount\u003c\/span\u003e\u003cspan\u003e, available at \u003c\/span\u003e\u003ca href=\"https:\/\/rvngraceworks.com\/\"\u003e\u003cspan\u003eRvng RaceWorks\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e, is engineered to reinforce one of the G8X platform's known weak points. This premium \u003c\/span\u003e\u003cspan\u003eG8X Differential Mount\u003c\/span\u003e\u003cspan\u003e utilizes the unused factory secondary bushing location to add a second support point, keeping the differential stable during hard acceleration, aggressive launches, and spirited driving.\u003c\/span\u003e\u003c\/p\u003e\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDesigned to reduce unwanted flex and improve driveline response, this \u003c\/span\u003e\u003cspan\u003eDual Differential Mount\u003c\/span\u003e\u003cspan\u003e enhances power transfer, stability, and overall driving confidence. Precision-built for strength and durability, it's an essential upgrade for enthusiasts looking to maximize the performance of their G8X platform. Follow \u003c\/span\u003e\u003cspan\u003eRvng RaceWorks\u003c\/span\u003e\u003cspan\u003e on \u003c\/span\u003e\u003ca href=\"https:\/\/www.instagram.com\/rvng_raceworks\/\"\u003e\u003cspan\u003eInstagram\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e to discover the latest performance upgrades, customer builds, and motorsport-inspired products.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eInstallation is super simple — no disassembly of OEM components needed. Insert the bushing, assemble the mount on the diff, and you have unparalleled driveline support.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhat is a dual diff mount, and how does it benefit my build?\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e1. \u003c\/span\u003e\u003cspan\u003eImproved load distribution\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe mount ties both sides of the differential into the subframe instead of relying on a single ear or bushing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThis spreads torque load more evenly under hard acceleration, launches, and aggressive shifts.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThat’s especially important on higher-torque cars where the diff wants to rotate upward.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cspan\u003e2. \u003c\/span\u003e\u003cspan\u003eReduced differential movement\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe billet bridge + side arms strongly limit diff wind-up and rotation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLess movement = more consistent driveline geometry.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eThis directly helps with:\u003c\/span\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eReduced wheel hop\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMore predictable traction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLess shock loading on axles and bushings\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cspan\u003e3.  \u003c\/span\u003e\u003cspan\u003eStructural rigidity \u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAll US 6061 machined aluminum \u003c\/li\u003e\n\u003cli\u003eWeighs only 20 oz for whole assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cspan\u003eOur Type III hard anodized\u003c\/span\u003e\u003cspan\u003e, also called \u003c\/span\u003e\u003cspan\u003ehard coat anodizing\u003c\/span\u003e\u003cspan\u003e, is a surface treatment applied electrically that greatly enhances the aluminum’s properties. Key benefits include:\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e    •    Extreme hardness \u0026amp; wear resistance\u003c\/span\u003e\u003cspan\u003e — significantly harder than typical anodizing and often compared to hardened steels in surface properties. \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e    •    Thick protective oxide layer\u003c\/span\u003e\u003cspan\u003e that resists scratching, abrasion and corrosion. \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e    •    Better surface durability under stress\u003c\/span\u003e\u003cspan\u003e — ideal for high-use parts. \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e    •    Good chemical resistance\u003c\/span\u003e\u003cspan\u003e and improved ability to retain lubricants. \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThis coating is compliant with \u003c\/span\u003e\u003cspan\u003eMIL-A-8625 Type III standards\u003c\/span\u003e\u003cspan\u003e, which is considered a \u003c\/span\u003e\u003cspan\u003emil-spec (military grade)\u003c\/span\u003e\u003cspan\u003e finish for aluminum parts that see heavy use.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFits all years: G80 M3 \/ G82\/G83 M4 \/ G87 M2.\u003c\/strong\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"No Bushing \/ Type 3 Hard Anodized","offer_id":47159807639730,"sku":"BTK-USA-T3-NOBUSH","price":549.99,"currency_code":"USD","in_stock":true},{"title":"80A Bushing (needed for installation) \/ Type 3 Hard Anodized","offer_id":47159807705266,"sku":"BTK-USA-T3-BUSH","price":599.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-1653.jpg?v=1772903883"},{"product_id":"btkusa-dual-differential-mount-g-series-m240i-m340i-m440i-a9x-supra","title":"BTKUSA DUAL DIFFERENTIAL MOUNT G SERIES M240i\/M340i\/M440i\/A9X SUPRA","description":"\u003cp\u003e\u003cstrong\u003eIn stock and ready to ship.\u003c\/strong\u003e Having trouble purchasing here? You can also order at \u003ca href=\"https:\/\/builttokillusa.com\"\u003ebuilttokillusa.com\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eEvery component — from the bushing and bolts to the full billet assembly — is proudly made in the USA.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMade in San Clemente, CA 🇺🇸\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eAll hardware for assembly included.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThe BuiltToKillUSA Differential Dual Mount is designed to reinforce one of the G-series platform’s known weak points. Designed for the G-series M240i, M340i, M440i, and A90\/A91 Supra, unlike most dual diff mounts on the market this system utilizes a bushing rather than completely solid mounting to the chassis. We did this to prevent unwanted noise, vibration, and hardness. With the \u003cstrong\u003eBUILTTOKILLUSA \u003c\/strong\u003edual diff mount you get all the benefit without sacrificing comfort of your daily driver. Our dual diff mount keeps the differential stable under hard acceleration, aggressive launches, and spirited driving. This reduces flex and sharpens overall driveline response.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThis system requires drilling a single mounting point into the subframe. To make installation straightforward, a properly sized drill bit is included in the kit. All supplied hardware is stainless steel, ensuring durability and resistance to corrosion over time.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• Introduces an additional reinforced mounting point to better control differential movement under load\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• Enhances traction, throttle response, and overall drivetrain stability\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• Utilizes a threaded steel backing plate for a secure, reliable mount—no rivet nuts or compromise hardware\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• Complete hardware kit included, along with the required drill bit for installation\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• Installation requires drilling one precise hole in the subframe\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• Designed as a straightforward bolt-on solution with no need to remove factory mounting components\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a dual diff mount, and how does it benefit my build?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e1. Improved load distribution\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• The mount ties both sides of the differential into the subframe instead of relying on a single ear or bushing.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• This spreads torque load more evenly under hard acceleration, launches, and aggressive shifts.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• That’s especially important on higher-torque cars where the diff wants to rotate upward.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e2. Reduced differential movement\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• Less movement = more consistent driveline geometry.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• This directly helps with:\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e◦ Reduced wheel hop\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e◦ More predictable traction\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e◦ Less shock loading on axles and bushings\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e3. Structural rigidity\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e• All US 6061 machined aluminum\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy We Use a Bushing Instead of a Solid Mount\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMost dual diff mounts on the market go fully solid but that isn’t always the best solution.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOur system uses a high-durometer 80A bushing to control differential movement without completely eliminating it. Under hard acceleration and clutch dumps, the bushing compresses slightly to absorb shock, then immediately stabilizes the drivetrain. This reduces unwanted flex while preventing harsh load spikes from being transferred directly into the subframe and mounting points.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThe result:\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMore controlled power delivery\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduced drivetrain shock and stress\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproved traction under load\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSignificantly less NVH compared to solid mounts\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eA full solid mount may eliminate all movement, but it can also transfer excessive force into the chassis. Our design provides a balanced solution by delivering near-solid performance while protecting your vehicle and maintaining street-friendly drivability. This upgrade is ideal for enthusiasts looking to increase car horsepower with improved drivetrain response and dependable performance. It works effectively with other upgrades such as car exhaust installation and supporting performance components to create a stronger and more controlled driving setup. Follow us on \u003ca href=\"https:\/\/www.instagram.com\/rvng_raceworks\/\"\u003eInstagram\u003c\/a\u003e to stay updated with new products, racing builds, and automotive performance content.\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":47267033022642,"sku":"BTK-MISC-GSER-DFDMT","price":494.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-3459.jpg?v=1775322631"},{"product_id":"btkusa-f9x-x3m-x4m-dual-diff-mount","title":"BTKUSA F9X X3M\/X4M Dual Diff Mount","description":"\u003cp\u003e\u003cspan\u003eThe BuiltToKillUSA F9X X3M\/X4M Differential Mount is designed to eliminate one of the biggest weak points in the drivetrain by adding additional support and reducing excessive differential movement under hard acceleration, launches, and aggressive driving.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThe factory setup allows the differential to twist and shift under load, which can lead to drivetrain slop, inconsistent power delivery, and added stress on the factory mounting points. Our upgraded mount helps stabilize the differential by distributing load more evenly and limiting unwanted movement without introducing the harshness of a fully solid setup.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBuilt using high-quality materials and engineered specifically for the F97 X3M and F98 X4M chassis, this mount improves drivetrain response, traction consistency, and overall stability while helping reduce stress on the factory diff bolt and mounting system — a known issue on high-power BMW platforms.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eEvery component of the BuiltToKillUSA Differential Mount is proudly sourced and manufactured 100% in the USA. From machining to hardware and finishing, every part of this product is built domestically to ensure the highest level of quality, consistency, and durability.\u003c\/span\u003e\u003c\/p\u003e\u003cp dir=\"ltr\"\u003e\u003cspan\u003eNVH control was a key consideration when developing this differential mount. To help distribute load more evenly while maintaining a refined driving experience, the design incorporates a compact 80A polyurethane bushing. Across our range of differential mounts, we have received zero NVH complaints so far, making this a practical option for enthusiasts exploring reputable \u003c\/span\u003e\u003cspan\u003etuning parts brands\u003c\/span\u003e\u003cspan\u003e and building a well-balanced performance setup with a \u003c\/span\u003e\u003cspan\u003eturbo performance upgrade\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp dir=\"ltr\"\u003e\u003cspan\u003eEnhance other areas of your performance build with the \u003c\/span\u003e\u003ca href=\"https:\/\/rvngraceworks.com\/products\/rvng-s58-b58-intake-manifold-block-off\"\u003e\u003cspan\u003eRVNG S58 B58 Intake\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e Manifold EVAP Block Off, a purpose-built component designed for compatible B58 and S58 engine applications. Follow us on \u003c\/span\u003e\u003ca href=\"https:\/\/www.instagram.com\/rvng_raceworks\/\"\u003e\u003cspan\u003eInstagram\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e to discover performance projects, customer builds, product showcases, and automotive content from the RVNG community.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeatures:\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDesigned specifically for F97 X3M \u0026amp; F98 X4M\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e100% USA sourced and manufactured components\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduces differential movement under load\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHelps reduce stress on the factory differential bolt\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproves throttle response and drivetrain stability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBetter traction consistency during launches and shifting\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePerformance-focused bushing design without excessive NVH\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCNC machined and built for long-term durability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDirect-fit installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e80A POLY BUSHING DESIGN \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cspan\u003eWhether your X3M\/X4M is stock power or a fully built high-horsepower setup, the BuiltToKillUSA Differential Mount is designed to provide the support and confidence the factory system lacks.\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Raw Billet","offer_id":67732398932146,"sku":"BTK-USA-F9X-1","price":599.99,"currency_code":"USD","in_stock":true},{"title":"Type 2 Hard Anodizing","offer_id":67732398964914,"sku":"BTK-USA-F9X-2","price":624.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-5079.jpg?v=1778213418"},{"product_id":"btkusa-g8x-x3m-x4m-s58-single-turbo-coolant-block-off-cap","title":"BTKUSA G8X\/X3M\/X4M S58 Single Turbo Coolant Block Off Cap","description":"\u003cp\u003e\u003cstrong\u003eBTKUSA SINGLE TURBO BLOCK OFF \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eWhen converting the S58 to a single turbo setup, the small auxiliary water pump fitting located at the front of the engine is no longer used and needs to be properly blocked off.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMost single turbo kits solve this with a basic plastic cap. While it gets the job done, we felt this was one of those small details that could be improved. On a build where everything else is being upgraded, a cheap plastic cap sitting on the front of the cooling system never made much sense to us.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThe BTKUSA S58 Billet Water Pump Block-Off Cap was designed as a cleaner, stronger, and more reliable solution for single turbo S58 applications. Machined from billet aluminum, this cap replaces the standard plastic plug with a more durable part that better matches the quality of the rest of the build.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThis piece is made to block off the unused auxiliary port on the factory S58 water pump when removing or rerouting factory components during a single turbo conversion. It is designed for a simple, direct installation and gives the front of the motor a much cleaner finished look.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eInstead of relying on an off the shelf plastic cap, we designed a solution that delivers a more purposeful and reliable upgrade. While it may be a small component, it plays an essential role in maintaining proper cooling system sealing, especially for vehicles producing serious power or experiencing extreme heat during street and track use. As part of quality best car mods and advanced car tuning parts, this upgrade helps improve durability and confidence in high performance builds. For additional cooling system upgrades, explore our internal collection of \u003ca href=\"https:\/\/rvngraceworks.com\/products\/btkusa-g8x-x3m-x4m-s58-billet-waterpump-fittings\"\u003eBTKUSA G8X X3M X4M S58\u003c\/a\u003e Billet Waterpump Fittings designed for enhanced reliability and precision fitment. Connect with RVNG RaceWorks on \u003ca href=\"https:\/\/www.instagram.com\/rvng_raceworks\/\"\u003eInstagram\u003c\/a\u003e for exclusive updates, performance content, and new automotive innovations.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeatures:\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for S58 single turbo conversions\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBlocks off the unused auxiliary fitting on the factory water pump\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMachined from billet aluminum\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStronger and cleaner than a basic plastic cap\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDirect-fit design for simple installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHelps clean up the front of the engine bay\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBuilt for high-performance BMW applications\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cspan\u003eThe BTKUSA Billet Water Pump Block-Off Cap is a simple upgrade, but it is the type of detail that separates a complete build from one that feels thrown together. Stronger material, cleaner appearance, and a better long-term solution for anyone converting their S58 to a single turbo setup.\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":47690857152690,"sku":"sku-45773575847980","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-6826.jpg?v=1783388653"},{"product_id":"btkusa-g8x-x3m-x4m-s58-billet-waterpump-fittings","title":"BTKUSA G8X\/X3M\/X4M S58 Billet Waterpump fittings","description":"\u003cp\u003e\u003cstrong\u003eBTKUSA BILLET WATER PUMP FITTINGS \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cbr\u003eThe factory S58 water pump adapters are one of those small parts that can turn into an expensive problem. From the factory, these adapters are plastic, and when they crack, break, or fail, BMW does not offer them as a simple standalone replacement. In most cases, the only option is replacing the entire water pump assembly, which can cost several hundred dollars just to fix a small adapter.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBTKUSA developed our billet S58 water pump adapters to solve that problem the right way. Instead of replacing the whole water pump with another unit that uses the same plastic pieces, our adapters allow you to replace the weak point directly.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMachined from 6061-T6 aluminum, these adapters are designed as direct replacements for the OEM pieces while offering a stronger, longer-lasting solution. Each adapter is made for simple plug-and-play installation and includes Viton O-rings for a proper seal.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThis is a simple and affordable upgrade for BMW enthusiasts who have experienced a broken factory adapter, want to avoid replacing the complete water pump, or need a stronger solution for long term reliability. The durable billet design provides extra peace of mind and works well alongside other performance upgrades like a turbo downpipe and cold air intake system. For drivers building a complete performance setup, explore our internal collection of \u003ca href=\"https:\/\/rvngraceworks.com\/products\/btkusa-f8x-s55-dual-diff-mount\"\u003eBTKUSA F8X\/S55 Dual Diff Mount\u003c\/a\u003e upgrades to improve drivetrain strength and reliability. Follow RVNG RaceWorks on \u003ca href=\"https:\/\/www.instagram.com\/rvng_raceworks\/\"\u003eInstagram\u003c\/a\u003e for the latest product updates, builds, and performance content.\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":47690857218226,"sku":"sku-45773571522604","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-6824.jpg?v=1783388658"},{"product_id":"btkusa-f8x-s55-dual-diff-mount","title":"BTKUSA F8X\/S55 DUAL DIFF MOUNT","description":"\u003cp\u003e\u003cstrong\u003eBTK USA F8X Dual Differential Mount\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThe factory F8X differential is designed with provisions for two rear mounting points, yet BMW chose to utilize only a single rear differential bushing. Under hard acceleration, aggressive launches, and high horsepower applications, this allows the differential to twist within the subframe, increasing driveline movement, wheel hop, and unnecessary stress on the factory mounting components. \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThe BTK Dual Differential Mount was engineered to unlock the second factory mounting location, transforming the rear differential into a true dual-supported design. By distributing drivetrain loads across two rear mounting points instead of one, differential deflection is significantly reduced, resulting in a more planted rear end, improved power transfer, and increased confidence under heavy acceleration.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMachined in the USA from aerospace-grade 6061-T6 billet aluminum, every mount is CNC machined for exceptional precision before receiving a durable Type III hard anodized finish for maximum wear and corrosion resistance. Every detail was designed to withstand the abuse of high-power street cars, drag builds, and dedicated track vehicles alike.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eWhether your F8X is making stock power or well into four-digit horsepower territory, the BTK Dual Differential Mount provides the rigidity and strength needed to keep the drivetrain under control without compromising fitment. Designed for enthusiasts upgrading their BMW setup, this mount works perfectly with other auto performance parts to improve drivetrain reliability and overall performance. For complete performance builds, combine it with supporting upgrades like a performance exhaust system and explore our internal collection of \u003ca href=\"https:\/\/rvngraceworks.com\/products\/all-g8x-s58-single-turbo-kit-components\"\u003eAll G8X\/S58 Single Turbo Kit Components\u003c\/a\u003e to maximize your vehicle’s power potential. Stay connected with RVNG RaceWorks for the latest builds on \u003ca href=\"https:\/\/www.instagram.com\/rvng_raceworks\/\"\u003eInstagram\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCNC machined from billet 6061-T6 aluminum\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eType III hard anodized finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUtilizes the factory secondary differential mounting location\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduces differential movement under load\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproves drivetrain stability and power transfer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHelps minimize wheel hop during aggressive launches\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEngineered and manufactured in the USA\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDirect bolt-on installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFits BMW F80 M3, F82\/F83 M4, and F87 M2 Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BuiltToKillUSA","offers":[{"title":"80A Bushings (needed for installation)","offer_id":47726688993458,"sku":"sku-45805322829868","price":499.99,"currency_code":"USD","in_stock":true},{"title":"I’ll provide my own","offer_id":47726689026226,"sku":"sku-45805322862636","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-7559.jpg?v=1785469979"},{"product_id":"btkusa-f8x-g8x-rear-toe-traction-arms","title":"BTKUSA F8X\/G8X Rear Toe\/Traction Arms","description":"\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eBuilt to Kill USA's \u003c\/strong\u003eBMW F8X and G8X \u003cstrong\u003eRear Toe Arms\u003c\/strong\u003e with eccentric lockout plates. Designed with intention of stabilizing rear suspension geometry under heavy driving loads. With any changes to your suspension like lowering, it affects toe and camber, our arms allow for precise adjustment and ensure stable alignment. Factory toe arms use eccentric adjustment, not allowing for much adjustment and continuous alignment. Hard street driving, drag, track, drift, these arms are for you. Eliminating factory bushings proves for a much more stable alignment throughout acceleration, breaking and cornering. Adjustability allows for perfect alignment of rear anti-squat and bump steer. Manufactured in the USA out of 6061-T6 Aluminum combined with Type 3 Mil-Spec Hard Anodizing. \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eAdjusting with FK heim joints with key features\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e· 4130 Chromoly body\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e· Corrosion resistant black coating\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e· 52100 Steel ball\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e· Hard chrome plated ball\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e· 6 FT-LB to 24 FT-LB no-load break away torque\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e· PTFE liner\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e2014-2021 F80 F82 F83 F87 M2 M3 M4\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e2021-current G80 G82 G83 G87 M2 M3 M4\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Set of 2 (Traction or Toe Only)","offer_id":48025255379122,"sku":"sku-46115662233644","price":399.99,"currency_code":"USD","in_stock":true},{"title":"Set of 4 (Traction \u0026 Toe)","offer_id":48025255411890,"sku":"sku-46115662266412","price":799.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/G8XLOWERCONTROLARMS1.jpg?v=1788982223"},{"product_id":"btkusa-x3-x4-m40i-dual-diff-mount","title":"BTKUSA X3\/X4 M40I Dual Diff Mount","description":"\u003cp\u003e\u003cstrong\u003eTHE OEM CROSS BRACES STILL FIT WITH THE DIFF MOUNT ITS REMOVED IN OUR PHOTOS FOR A CLEARER IMAGE OF THE MOUNT \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDOES NOT FIT M PERFORMANCE DIFF PLEASE CHECK YOUR VIN TO SEE IF YOU HAVE THE SAME DIFF AS SHOWN IN THE ON CAR PHOTOS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIMPORTANT FITMENT NOTICE: The X3\/X4 M40i platform has significant factory variation in differential positioning, meaning each differential may sit slightly differently from vehicle to vehicle. Early production units experienced occasional fitment issues due to these variations. We have since revised the design to better accommodate these differences, with no reported installation issues on updated units.\u003cbr\u003eHowever, factory positioning variations are still present and are not specific to any model year or bushing type. Please keep this in mind during installation and contact us if you experience any fitment difficulties.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eALL HARDWARE REQUIRED FOR INSTALLATION IS INCLUDED\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePROUDLY MADE IN SAN CLEMENTE, CALIFORNIA 🇺🇸\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cspan\u003eBuiltToKillUSA G01 X3 M40i \/ G02 X4 M40i Differential Mount\u003c\/span\u003e\u003cspan\u003e is engineered to eliminate one of the biggest weak points in the drivetrain by adding additional support and reducing excessive differential movement during hard acceleration, launches, and spirited driving.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe factory rear differential mounting system allows the differential to rotate and shift under load. As power levels increase, this movement can lead to drivetrain slop, inconsistent power delivery, wheel hop, and additional stress on the factory differential mounting points and hardware. Our upgraded differential mount stabilizes the differential by distributing load more evenly while limiting unwanted movement—without introducing the harshness of a fully solid-mounted setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePrecision CNC machined and engineered specifically for the \u003c\/span\u003e\u003cspan\u003eG01 X3 M40i\u003c\/span\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cspan\u003eG02 X4 M40i\u003c\/span\u003e\u003cspan\u003e, this mount improves drivetrain response, traction consistency, and overall vehicle stability while helping reduce stress on the factory differential mounting system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEvery component of the BuiltToKillUSA Differential Mount is proudly \u003c\/span\u003e\u003cspan\u003e100% sourced and manufactured in the United States\u003c\/span\u003e\u003cspan\u003e. From the billet aluminum components to the hardware, polyurethane bushing, machining, anodizing, and final assembly, every part is produced domestically to deliver the highest level of quality, consistency, and durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOne of our primary goals during development was minimizing NVH (Noise, Vibration, and Harshness). Instead of using a fully solid-mounted design, we incorporated a specially selected \u003c\/span\u003e\u003cspan\u003e80A polyurethane bushing\u003c\/span\u003e\u003cspan\u003e that effectively spreads drivetrain loads while maintaining excellent street manners. Across our entire lineup of differential mounts, we have received \u003c\/span\u003e\u003cspan\u003ezero NVH complaints\u003c\/span\u003e\u003cspan\u003e, making this an ideal upgrade for both daily driven and high-performance vehicles.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eDesigned specifically for \u003c\/span\u003e\u003cspan\u003eG01 BMW X3 M40i\u003c\/span\u003e\u003cspan\u003e \u0026amp; \u003c\/span\u003e\u003cspan\u003eG02 BMW X4 M40i\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e100% USA sourced and manufactured components\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduces differential movement under load\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHelps reduce stress on the factory differential mounting system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproves throttle response and drivetrain stability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreases traction consistency during launches and shifting\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePerformance-focused polyurethane bushing design without the excessive NVH common with fully solid-mounted competitors\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecision CNC-machined billet aluminum construction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLong-lasting anodized finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDirect bolt-on installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e80A Polyurethane Bushing Design\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eWhether your \u003c\/span\u003e\u003cspan\u003eX3 M40i\u003c\/span\u003e\u003cspan\u003e or \u003c\/span\u003e\u003cspan\u003eX4 M40i\u003c\/span\u003e\u003cspan\u003e is stock, lightly modified, or built for significantly increased power, the BuiltToKillUSA Differential Mount provides the drivetrain support and confidence the factory mounting system simply wasn’t designed to offer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePROFESSIONAL INSTALLATION IS RECOMMENDED\u003c\/span\u003e\u003cspan\u003e, as installation requires a rivet nut (rivnut) tool. This inexpensive tool can be purchased through Amazon or most local hardware stores if you plan to complete the installation yourself.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEVERY COMPONENT FROM THE POLYURETHANE BUSHING AND HARDWARE TO THE COMPLETE CNC-MACHINED BILLET ASSEMBLY IS PROUDLY DESIGNED, MACHINED, AND MANUFACTURED IN THE USA.\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":67643719975090,"sku":"sku-45870008598572","price":559.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-7473.jpg?v=1791320565"},{"product_id":"btkusa-g8x-f8x-adjustable-front-lower-control","title":"BTKUSA G8X\/F8X Adjustable Front Lower Control","description":"\u003cp\u003e\u003cstrong\u003eBTKUSA G8X\/F8X Adjustable Lower Control Arms \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMADE IN USA 🇺🇸 \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eBTKUSA BMW G8X Front Lower Control Arms (FLCA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe BTKUSA G8X Front Lower Control Arms were engineered to improve front suspension geometry, increase rigidity, and provide significantly more alignment adjustment than the factory control arms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLowering the G8X chassis changes the factory suspension geometry and can leave the car with less-than-ideal alignment and roll center characteristics. This can contribute to uneven tire wear, reduced front-end response, and increased understeer. Our adjustable FLCA design gives you the ability to properly dial the front suspension back in for street, track, or aggressively lowered setups.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach arm is machined from \u003c\/span\u003e\u003cspan\u003e6061-T6 billet aluminum\u003c\/span\u003e\u003cspan\u003e for an extremely rigid yet lightweight construction. The arms are paired with \u003c\/span\u003e\u003cspan\u003e17-4 H900 stainless steel double adjusters\u003c\/span\u003e\u003cspan\u003e, allowing for precise adjustment without the hassle of traditional jam-nut style designs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAdjustment allows you to fine-tune \u003c\/span\u003e\u003cspan\u003ecamber and track width\u003c\/span\u003e\u003cspan\u003e, while our interchangeable roll center spacers allow the ball joint position to be corrected for lowered vehicles. Maintaining the proper ball joint angle also allows the suspension to articulate correctly throughout its range of motion instead of introducing unnecessary binding.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA factory-style ride height sensor mounting provision is incorporated into the design to retain proper sensor positioning as the arm is adjusted.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned with both \u003c\/span\u003e\u003cspan\u003eform and function\u003c\/span\u003e\u003cspan\u003e in mind, the BTKUSA FLCA provides the strength, adjustability, and suspension geometry correction needed to properly set up the front end of your G8X.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eCNC machined 6061-T6 billet aluminum control arms\u003c\/li\u003e\n\u003cli\u003e17-4 H900 stainless steel double adjusters\u003c\/li\u003e\n\u003cli\u003ePTFE-lined FK rod ends\u003c\/li\u003e\n\u003cli\u003eCamber adjustment\u003c\/li\u003e\n\u003cli\u003eTrack width adjustment\u003c\/li\u003e\n\u003cli\u003eAdjustable roll center correction\u003c\/li\u003e\n\u003cli\u003eProper ball joint geometry for full suspension articulation\u003c\/li\u003e\n\u003cli\u003eIncreased rigidity compared to the factory control arm\u003c\/li\u003e\n\u003cli\u003eDesigned for lowered street and track applications\u003c\/li\u003e\n\u003cli\u003eFactory ride height sensor mounting provision\u003c\/li\u003e\n\u003cli\u003eSold as a pair\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBMW G8X M2 \/ M3 \/ M4 X DRIVE \u0026amp; RWD\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBMW F8X M2\/ M3\/ M4 RWD \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSold as a complete pair.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"G8X AWD","offer_id":67643720007858,"sku":"sku-46338470674476","price":899.99,"currency_code":"USD","in_stock":true},{"title":"F8X\/G8X RWD","offer_id":67643720040626,"sku":"sku-46338470707244","price":899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/8E7C4B2B-4D57-42B3-ADA6-77B3D025DEE7.jpg?v=1791320565"},{"product_id":"btkusa-x3-x4-m-m40i-engine-brace","title":"BTKUSA X3\/X4 M\/M40i Engine Brace","description":"\u003cp\u003e\u003cspan\u003eBTKUSA BMW X3M\/X4M \u0026amp; X3\/X4 M40i Billet Engine Cross Braces\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMADE IN USA 🇺🇸\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFITMENT NOTICE: Compatible with both the BMW X3M\/X4M and X3\/X4 M40i models.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe BTKUSA Billet Engine Cross Braces were designed to improve chassis rigidity while bringing a completely new level of quality and appearance to the engine bay.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePrecision CNC-machined from solid aluminum billet, each brace features a lightweight, high-strength design with extensive machining to remove unnecessary material while maintaining structural integrity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike conventional stamped metal braces, our billet design offers a more refined construction engineered to reinforce the front chassis and minimize unwanted flex under load.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEvery detail was carefully considered, from the machined pockets and contours to the final surface finish. The result is a functional chassis upgrade that looks just as good as it performs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eProudly designed and manufactured in the USA.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePrecision CNC-machined billet aluminum construction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned to improve front chassis rigidity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLightweight design with strategically removed material\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntricate machining and premium surface finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDirect bolt-on design utilizing factory mounting locations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSold as a pair (2 braces)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eProudly made in the USA 🇺🇸\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eVehicle Fitment\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW F97 X3M \/ X3M Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW F98 X4M \/ X4M Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW G01 X3 M40i\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW G02 X4 M40i\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eBuilt To Kill the Competition.\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":67843545628850,"sku":"sku-46510143766572","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-0025.jpg?v=1793322419"},{"product_id":"btkusa-x3-x4-m-m40i-adjustable-rear-lower-control-arms","title":"BTKUSA X3\/X4 M\/M40I Adjustable Rear Lower Control Arms","description":"\u003cp\u003e\u003cstrong\u003eBTKUSA X3M\/X4M \u0026amp; X3\/X4 M40i Adjustable Rear Lower Control Arms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMADE IN USA 🇺🇸\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFITMENT NOTICE: These Rear Lower Control Arms are designed to fit BOTH the BMW X3M\/X4M and X3\/X4 M40i platforms. The same control arms are compatible with both models.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBTKUSA BMW Adjustable Rear Lower Control Arms (RLCA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe BTKUSA Adjustable Rear Lower Control Arms were engineered to improve rear suspension rigidity, increase alignment adjustability, and provide greater control over suspension geometry for the BMW X3M\/X4M and X3\/X4 M40i platforms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLowering these vehicles changes the factory suspension geometry, which can affect rear wheel alignment, tire wear, and overall handling characteristics. Our adjustable RLCA design provides the ability to fine-tune rear suspension alignment, allowing for a more precise setup for street, drag, track, or aggressively lowered applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach arm is CNC machined from billet aluminum, providing an extremely rigid yet lightweight construction. Starting with approximately 20 LBS of aluminum, the arms are precision machined down to just 7.4 LBS for the complete pair, removing unnecessary material while maintaining structural strength where it matters most.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe adjustable design allows for greater control over rear suspension alignment compared to the factory arms. This is especially beneficial for lowered vehicles where factory adjustment may not provide the range needed to achieve the desired suspension setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith the X3M\/X4M and X3\/X4 M40i being heavier, higher center-of-gravity platforms, maintaining proper rear suspension geometry and rigidity is especially important for predictable handling, stability, and consistent suspension performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned with both form and function in mind, the BTKUSA Rear Lower Control Arms combine precision machining, increased adjustability, and an exceptionally rigid construction to provide a comprehensive upgrade over the factory components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFrom the initial design and material sourcing to the final machining and finishing process, every step is proudly completed in the USA.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCNC machined billet aluminum control arms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003estainless steel sleeves for better load distribution and longevity \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustable rear suspension alignment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreased alignment adjustment range compared to factory\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreased rigidity compared to factory control arms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLightweight construction — just 7.4 LBS per pair\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecision machined to minimize unnecessary weight\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for lowered street and track applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproved ability to fine-tune rear suspension geometry\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePremium anodized finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned and manufactured in the USA 🇺🇸\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSold as a complete pair\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003etype 2 hard anodized \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBMW X3M \/ X4M\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW F97 X3M\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW F97 X3M Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW F98 X4M\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW F98 X4M Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eBMW X3 \/ X4 M40i\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW G01 X3 M40i\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW G02 X4 M40i\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eSold as a complete pair.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMade in USA 🇺🇸\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":67843545596082,"sku":"sku-46509155123244","price":1899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-0013.jpg?v=1793322420"},{"product_id":"btkusa-x3m-x4m-adjustable-front-lower-control-arms","title":"BTKUSA X3M\/X4M Adjustable Front Lower Control Arms","description":"\u003cp\u003e\u003cstrong\u003eBTKUSA X3M\/X4M Adjustable Front Lower Control Arms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMADE IN USA 🇺🇸\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBTKUSA BMW F97 X3M \/ F98 X4M Adjustable Front Lower Control Arms (FLCA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe BTKUSA X3M\/X4M Front Lower Control Arms were engineered to improve front suspension geometry, increase rigidity, and provide significantly more alignment adjustability than the factory control arms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLowering the X3M\/X4M chassis changes the factory suspension geometry, affecting camber, roll center, and overall suspension characteristics. These changes can contribute to uneven tire wear, reduced steering response, and increased understeer. Our adjustable FLCA design allows you to properly dial in the front suspension for improved handling, alignment, and overall front-end performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach arm is CNC machined from 6061-T6 billet aluminum, providing an extremely rigid yet lightweight construction. The arms are paired with 17-4 H900 stainless steel double adjusters, allowing for precise adjustments without the hassle of traditional jam-nut style designs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe adjustable design allows you to fine-tune camber and track width, while our interchangeable roll center spacers provide the ability to correct suspension geometry on lowered vehicles. Maintaining proper ball joint positioning also helps preserve suspension articulation throughout its range of motion, minimizing unnecessary binding.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA factory-style ride height sensor mounting provision is incorporated into the design to retain proper sensor positioning as the arm is adjusted.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith the X3M\/X4M being a heavier, higher center-of-gravity platform, maintaining proper front suspension geometry and rigidity is especially important for consistent handling and steering response.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned with both form and function in mind, the BTKUSA Front Lower Control Arms provide the strength, adjustability, and suspension geometry correction needed to properly set up the front end of your X3M\/X4M.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCNC machined 6061-T6 billet aluminum control arms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e17-4 H900 stainless steel double adjusters\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustable camber\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustable track width\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInterchangeable roll center correction spacers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptimized ball joint geometry for suspension articulation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreased rigidity compared to factory control arms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproved front suspension alignment adjustability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for lowered street and track applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFactory-style ride height sensor mounting provision\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eProudly manufactured in the USA 🇺🇸\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSold as a complete pair\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW F97 X3M \/ X3M Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW F98 X4M \/ X4M Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eSold as a complete pair.\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":67843547070642,"sku":"sku-46509123960876","price":899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/IMG-0004.jpg?v=1793322424"},{"product_id":"btkusa-992-porsche-gt3-gt3rs-rear-adjustable-lower-control-arms","title":"BTKUSA 992 Porsche GT3\/GT3RS rear adjustable lower control arms","description":"\u003ch3\u003e\u003cstrong\u003eBTKUSA Porsche 992 GT3 \/ GT3 RS Rear Lower Control Arms\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eMADE IN USA 🇺🇸\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe BTKUSA Porsche 992 GT3 \/ GT3 RS Rear Lower Control Arms were engineered to improve rear suspension geometry, increase alignment adjustability, and provide greater control over rear-end handling characteristics under demanding driving conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhile the factory Porsche suspension is exceptionally capable, its limited camber adjustment can become a restriction when optimizing the vehicle for more aggressive track applications. Our rear lower control arms are designed to expand the available negative camber range, allowing drivers to fine-tune their suspension setup for improved rear tire contact, cornering stability, and overall handling performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIncreasing negative camber helps maintain a more effective tire contact patch during aggressive cornering, reducing excessive loading on the outer tire shoulder. This is particularly beneficial during high-speed cornering and extended track sessions, where maintaining consistent grip and tire temperatures is essential.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOur design focuses on providing greater suspension precision and alignment flexibility while maintaining the functionality of the factory suspension system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eIncreased negative camber adjustment range compared to factory control arms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGreater flexibility for rear suspension alignment and geometry optimization\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproved ability to maintain rear tire contact during high-load cornering\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreased rear-end stability and more predictable handling characteristics\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproved potential for even tire temperature distribution and reduced outer-shoulder wear with proper alignment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for aggressive street and track alignment applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecision-engineered for the Porsche 992 GT3 \/ GT3 RS platform\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eProudly manufactured in the USA 🇺🇸\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003ePorsche 992 GT3\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePorsche 992 GT3 RS\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eArt + Function + Innovation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBuilt to Kill the Competition.\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":67843575414962,"sku":"sku-46531314974764","price":1999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/992_GT3RS_LWR_CNTRL_ARM_1.jpg?v=1793322911"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/collections\/8E7C4B2B-4D57-42B3-ADA6-77B3D025DEE7.jpg?v=1791320842","url":"https:\/\/rvngraceworks.com\/collections\/btk-diff-mount.oembed?page=2","provider":"Rvng RaceWorks","version":"1.0","type":"link"}