$595.00 USD
$595.00 USD
















You asked, we delivered. Here is our latest innovative release for the B58 / S58 platform!
Lead time is currently 5 days to ship.
The Black Market Race B58 Coolant Reservoir solves multiple problems with the OEM system, including preventing coolant from overflowing onto the front tire causing loss of control. This issue was first brought to our attention by the drivers and builders of the fastest BMW's in the world. We knew we had a solution!
Each reservoir includes a 2 Bar radiator cap, with an overflow line. Optionally kits can include an overflow tank to be located in the trunk.
Our B58 Coolant reservoirs also include an 1/8th NPT pressure reference port which can be used in combination with most tuning software's to integrate coolant pressure based safeties (Eg head starts to lift, coolant pressure spikes, safety triggers limp mode)
Our reservoirs are cut out of solid chunks of 6061 aluminum and assembled together with high temp chemical and steam resistant O rings, we pressure test each reservoir to 150psi to guarantee ZERO leaks.
These reservoirs are 100% Plug and play with OEM coolant lines on the B58 TU (2020+)
What's included:
(G Chassis)
Replacement for BMW 17138610652
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$595.00 USD
$595.00 USD
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
For a complete list of chemicals known to cause harm, visit https://www.p65warnings.ca.gov/chemicals.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell, install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB), it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.
All performance, racing, or competition parts sold by this company are intended solely for off-road, closed-course, or competition use on vehicles that are never registered or used on public highways.
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the use of emission-control defeat devices or any modification that violates the Clean Air Act or state regulations.