{"product_id":"rvng-x3m-x4m-5-hydroflow-race-downpipes-coming-soon","title":"RVNG X3M\/X4M 5” HydroFlow Race Downpipes (COMING SOON)","description":"\u003cp\u003e\u003cstrong\u003e⚠️ (THIS PRODUCT IS FOR OFFROAD \u0026amp; RACE USE ONLY)\u003c\/strong\u003e\u003cbr\u003eNot 50-state compliant — may not be legal for street use depending on your state's emissions laws. See our \u003ca href=\"\/pages\/rvng-off-road-disclaimer\"\u003eOff-Road Use Disclaimer\u003c\/a\u003e for full details.\u003c\/p\u003e\n\u003ch2\u003eRvng 5” Inlet High Flow Stainless Steel Downpipes\u003c\/h2\u003e\n\u003cp\u003eSwipe to the end of the gallery for sound clips and photos.\u003c\/p\u003e\n\u003cp\u003eNote: the 400-cell version looks identical — it carries a 400-cell catalytic filter within the 5” section.\u003c\/p\u003e\n\u003cp\u003eRVNG 5” Hydroformed High-Flow Stainless Steel Downpipes\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003eFor 2020+ BMW F97 X3 M and F98 X4 M with the S58 Engine\u003c\/p\u003e\n\u003cp\u003eIntroducing the \u003cstrong\u003eRVNG 5” Hydroformed S58 Downpipes\u003c\/strong\u003e for the X3 M and X4 M — designed for owners who want maximum flow, faster spool, and a more aggressive exhaust note from their S58-powered SAV.\u003c\/p\u003e\n\u003cp\u003eMost traditional S58 downpipes on the market use a 3” or 3.5” design. Our hydroformed design takes flow capacity even further with a massive 5” inlet section to reduce turbulence and improve exhaust gas transition directly out of the turbo.\u003c\/p\u003e\n\u003cp\u003eTo put the sizing into perspective:\u003c\/p\u003e\n\u003cp\u003eA traditional 3” downpipe has roughly 7.07 square inches of cross-sectional area.\u003cbr\u003eA 3.5” downpipe has roughly 9.62 square inches of cross-sectional area.\u003cbr\u003eA 5” inlet has roughly 19.63 square inches of cross-sectional area.\u003c\/p\u003e\n\u003cp\u003eThat means our 5” inlet offers approximately:\u003c\/p\u003e\n\u003cp\u003e178% more flow area than a 3” downpipe\u003cbr\u003e104% more flow area than a 3.5” downpipe\u003cbr\u003e2.78x the area of a 3” pipe\u003cbr\u003e2.04x the area of a 3.5” pipe\u003c\/p\u003e\n\u003cp\u003eThe result is a downpipe designed to support serious power while helping reduce back pressure, improve turbo response, and unlock the raw sound of the S58 in a heavier, all-wheel-drive platform where turbo efficiency matters even more.\u003c\/p\u003e\n\u003cp\u003eUnlike standard pie-cut or traditional mandrel-bent designs, our hydroformed construction allows for smoother transitions, better packaging, and improved internal flow characteristics. Each set is built from high-quality stainless steel and designed for direct fitment on the F97 X3 M and F98 X4 M, including Competition models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon sizing misconception:\u003c\/strong\u003e\u003cbr\u003eYou may hear people say, “bigger exhaust piping kills low-end torque.” On a naturally aspirated car, there can be truth to that. Exhaust diameter plays a major role in velocity, scavenging, and torque curve behavior.\u003c\/p\u003e\n\u003cp\u003eBut the S58 is not naturally aspirated.\u003c\/p\u003e\n\u003cp\u003eOn a turbocharged engine, the downpipe sits after the turbocharger. The priority is reducing restriction after the turbine, not creating backpressure. Less post-turbo restriction allows exhaust gas to leave the turbine more efficiently, helping the turbo work against less resistance.\u003c\/p\u003e\n\u003cp\u003eThe RVNG 5” hydroformed inlet gives the S58 more flow area directly at the highest-pressure point of the downpipe, then smoothly transitions through the hydroformed body to reduce turbulence and maintain proper packaging.\u003c\/p\u003e\n\u003cp\u003eThis design is about more than size. It is about giving the turbos a cleaner, less restrictive path to move exhaust gas out of the system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMassive 5” hydroformed inlet design for increased flow capacity\u003c\/li\u003e\n\u003cli\u003eApproximately 178% more cross-sectional area than a 3” downpipe\u003c\/li\u003e\n\u003cli\u003eApproximately 104% more cross-sectional area than a 3.5” downpipe\u003c\/li\u003e\n\u003cli\u003eHelps reduce back pressure for improved turbo efficiency\u003c\/li\u003e\n\u003cli\u003eDesigned to improve spool, throttle response, and top-end power potential\u003c\/li\u003e\n\u003cli\u003eAggressive S58 exhaust tone with increased volume and turbo sound\u003c\/li\u003e\n\u003cli\u003eConstructed from high-quality stainless steel\u003c\/li\u003e\n\u003cli\u003eSmooth hydroformed transitions to reduce turbulence\u003c\/li\u003e\n\u003cli\u003eDirect-fit design for F97 X3 M and F98 X4 M\u003c\/li\u003e\n\u003cli\u003eFits RHD and LHD vehicles with no modification required\u003c\/li\u003e\n\u003cli\u003eIncludes high-quality mounting hardware\u003c\/li\u003e\n\u003cli\u003eBacked by the RVNG lifetime warranty against defects and fitment issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2020+ BMW F97 X3 M, including Competition\u003c\/li\u003e\n\u003cli\u003e2020+ BMW F98 X4 M, including Competition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor best results, tuning is recommended. Power gains will vary depending on fuel, tune, turbo setup, supporting modifications, and vehicle condition.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Rvng RaceWorks","offers":[{"title":"Uncoated","offer_id":67790180155570,"sku":null,"price":649.99,"currency_code":"USD","in_stock":false},{"title":"High Temp Ceramic 1800","offer_id":67790180188338,"sku":null,"price":799.99,"currency_code":"USD","in_stock":false},{"title":"400 Cell","offer_id":67790180221106,"sku":null,"price":1299.99,"currency_code":"USD","in_stock":false},{"title":"400 Cell High Temp Ceramic 1800","offer_id":67790180253874,"sku":null,"price":1499.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/2787\/8834\/files\/2F44BF36-B74D-4DD6-8398-290D1756F9A1.jpg?v=1792784794","url":"https:\/\/rvngraceworks.com\/products\/rvng-x3m-x4m-5-hydroflow-race-downpipes-coming-soon","provider":"Rvng RaceWorks","version":"1.0","type":"link"}