BTKUSA G8X/X3M/X4M S58 Single Turbo Coolant Block Off Cap
Pairs well with
Description
BTKUSA SINGLE TURBO BLOCK OFF
When 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.
Most 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.
The 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.
This 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.
Instead of using an off-the-shelf plastic cap, we wanted to make something that felt intentional. It is a small part, but it serves an important purpose. Cooling system connections should be sealed properly, especially on cars making serious power, seeing high heat, or being pushed hard on the street and track.
Features:
- Designed for S58 single turbo conversions
- Blocks off the unused auxiliary fitting on the factory water pump
- Machined from billet aluminum
- Stronger and cleaner than a basic plastic cap
- Direct-fit design for simple installation
- Helps clean up the front of the engine bay
- Built for high-performance BMW applications
The 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.
BTKUSA G8X/X3M/X4M S58 Single Turbo Coolant Block Off Cap
FAQs
Answers to our most common questions below.
How Long Does Shipping Take?
All Rvng items ship within 1-3 days, if an item is out of stock the customer will be notified with the choice of a refund or an estimated timeline of delivery.
Do You Have Exhaust Parts For My Car?
We make a range of downpipes and exhaust systems for almost all BMW's. We choose to specialize in that market so we can always insure we are selling the best product possible for your Beamer!
Do You Offer In Person Pick-Up & Installs In Cali?
Yes, We are located in Garden Grove in Orange County, California. We invite any of our customers to pick-up in stock items and for any install or car related work.
Will Installing These Parts Void My Factory Warranty?
Aftermarket performance parts can affect your factory warranty on related components under the Magnuson-Moss Warranty Act — a dealer must prove the part caused the failure to deny a claim. We recommend speaking with your dealer or tuner. Our parts are precision-engineered to factory tolerances and we stand behind every product with our own Lifetime Warranty against defects and fitment issues.
Do These Parts Require a Tune?
Some parts — particularly downpipes, intake kits, and fuel system upgrades — will require or strongly benefit from an ECU tune to see full performance gains and to prevent check engine lights. Parts like heat exchangers, oil coolers, and hardware do not require a tune. We recommend reaching out to us or your local tuner before purchasing if you're unsure.
What Is Your Return Policy?
We accept returns within 30 days of delivery on unused, uninstalled, and undamaged items in original packaging. Custom or made-to-order parts are non-returnable. To start a return, contact us at rvngperformance@yahoo.com with your order number. Return shipping is the customer's responsibility unless the item arrived damaged or incorrect.
Are Your Catless Downpipes Street Legal?
Catless downpipes are intended for off-road and track use only. They are not emissions compliant and will trigger a check engine light without an appropriate tune or O2 spacers. If you need a street-legal option, contact us — we can discuss catted alternatives depending on your platform.
How Do I Know This Will Fit My Car?
Every RVNG product is developed and validated on the specific platforms listed. If your exact build year, model, or configuration isn't listed, contact us before ordering — we'll confirm fitment. We stand behind every part with our Fitment Guarantee: if it doesn't fit as described, we'll make it right.
If you have any questions, we're always welcome to help. We'll get back to you within 24 hours on weekdays.
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Shipping Information
All orders ship within 1-3 business days from our Garden Grove, CA facility.
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Customer Support
We're here to help. Reach out anytime and we'll get back to you within 24 hours on weekdays.
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FAQ's
Check out our FAQ section below for answers to our most common questions.
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Contact Us
Located in Garden Grove, CA. Stop by for pickup or install appointments — we'd love to meet you.