$595.00 USD
$595.00 USD






















The Goldenwrench Blackline Performance BMW M Car S58 Engine Cap Cover Set is a precision-machined engine bay upgrade engineered for BMW M vehicles equipped with the S58 engine. CNC-formed from high-strength T6 aluminum and finished with an anodized coat and 3D-milled detailing, this cap set delivers a refined, motorsport-inspired look across both the oil cap and coolant cap positions — replacing flat factory plastic with purposeful billet components.
Available in Edition Red, Motorsport Blue, and Anthracite Grey, each cap receives its branding through advanced 3D milling rather than decals or paint — meaning the finish holds up to engine bay heat, cleaning, and long-term use. These are precision overlay covers that install directly over the factory oil and coolant caps, preserving OEM functionality and sealing integrity while transforming the underhood appearance. The design language is consistent with the broader Blackline product line, making this set a natural complement to other Blackline components already on the vehicle.
Installation requires no modification and no special tools. Covers affix over the factory caps and seat securely in place. The process takes only minutes, and the result is a clean, cohesive engine bay finish suited to both daily-driven M cars and show-level builds.
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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.