$595.00 USD
$595.00 USD






















The Goldenwrench Blackline Performance BMW M Car Series Charge Cooler Tank Cap Cover is a premium billet aluminum upgrade for the factory plastic charge cooler coolant tank cap on compatible BMW M vehicles. Designed with the same precision CNC-machined T6 aluminum construction and anodized finish standards as the wider Blackline Performance cap line, this piece directly addresses one of the more visible factory plastic components in the engine bay of high-output S55 and S63-equipped BMW M cars.
Each cap cover is CNC-machined from high-grade T6 aluminum, then anodized and precision 3D-milled for a consistent, durable finish. Available in Edition Red, Anthracite Grey, and Motorsport Blue. The Blackline Performance design elements are machined into the cap surface, maintaining a cohesive appearance alongside other Blackline products in the engine bay. Compatible with BMW M models equipped with the S55 and S63 engines. Verify that your factory coolant cap shape matches the product images prior to purchase.
This is a cap cover, not a full replacement. It affixes directly over the existing factory charge cooler coolant cap in minutes with no modification required. Each kit includes the billet cap cover and an installation guide.
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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.