GoldenWrench BMW E90, E92 & E93 M3 S65 BLACKLINE Performance Engine Cap Cover Set

Transform the look and finish of your BMW S65 engine bay with the GoldenWrench BLACKLINE Performance Engine Cap Cover Set for E90, E92 & E93 M3, engineered to replace factory plastic caps with precision-machined billet aluminium upgrades. Designed for enthusiasts who value quality and detail, this complete set enhances key engine bay components with a premium finish while maintaining perfect fitment and long-term durability.

Key Features:

• Complete BLACKLINE engine cap cover set for S65-powered M3
• CNC-machined from high-grade billet aluminium
• Premium anodised BLACKLINE finish
• Precision 3D-milled detailing for a high-end look
• Designed for perfect OEM fitment and integration
• Durable construction for long-term engine bay conditions
• Simple installation over existing caps

Complete Engine Bay Upgrade

This kit replaces three of the most visible plastic components in the S65 engine bay with high-quality billet aluminium covers:

• Coolant expansion tank cap cover
• Oil cap cover
• Washer fluid cap

Together, these upgrades create a cohesive, premium appearance that significantly improves the overall presentation of your engine bay.

Precision CNC-Machined Construction

Each component is manufactured using advanced CNC machining techniques from billet aluminium, ensuring:

• Exceptional strength and durability
• Consistent precision and fitment
• High resistance to heat and engine bay conditions

The BLACKLINE anodised finish provides a refined, stealthy aesthetic while protecting against wear and corrosion.

Premium Detailing & Finish

All logos and detailing are precision 3D-milled directly into the aluminium, delivering:

• A crisp, high-quality finish
• Long-lasting detail that won’t fade or peel
• A true premium feel compared to standard plastic components

OEM Fitment & Easy Installation

Designed specifically for the BMW S65 engine platform, each cap cover installs easily over the factory components, providing a seamless upgrade with no permanent modifications required.

What’s Included?

• Coolant Expansion Tank Cap Cover
• Oil Cap Cover
• Washer Fluid Cap

Compatibility

• BMW E90 M3
• BMW E92 M3
• BMW E93 M3
• S65 V8 Engine

Why Choose GoldenWrench?

GoldenWrench is known for producing high-quality billet upgrades that enhance both the appearance and detail of BMW engine bays, combining precision engineering with premium materials.

Why Buy from R44 Performance?

R44 Performance supplies premium BMW upgrades trusted by enthusiasts worldwide.

• BMW specialists
• Carefully curated performance and styling parts
• Fast UK and international shipping
• Expert support and product knowledge

Refine your BMW with the GoldenWrench BLACKLINE Engine Cap Cover Set, delivering a cleaner, more premium engine bay with precision-machined billet quality.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.