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 Goldenwrench Supply Co. is where form meets function, creating premium car overlays and accessories that elevate a vehicle’s style without compromise. Known for its BLACKLINE series, the brand offers mirror overlays, reflector kits, taillight accents, and performance hardware that blend seamlessly with any build. Goldenwrench backs every product with detailed installation guides, lifetime warranty coverage, and worldwide shipping, ensuring both quality and support. Designed by enthusiasts for enthusiasts, Goldenwrench Supply Co. delivers precision, personality, and performance in every part.

EXPLORE GOLDENWRENCH SUPPLY CO. PRODUCTS

BMW Mirror Overlay

BLACKLINE Performance

The BLACKLINE Billet Oil Cap Covers are CNC-machined from T6 aluminum and anodised in a limited, race-inspired finish of your choosing. It features the new Drip G logo, engraved BLACKLINE insignia, and a “Synthetic Oil Only” reminder. Designed to fit most various car models, it installs easily over the factory oil cap.

BMW Mirror Overlay

Mirror Overlay Kits

These kits replicate the mirror indicator style from the Formula87 M2 and other modern M models. Made from 3.2 mil outdoor-grade vinyl, each overlay is precision-cut for an accurate fit and allows easy adjustment during installation. Includes overlays and instructions.

BMW Mirror Overlay

Rear Reflector Overlay Kits

Designed to enhance the look of the factory rear reflector while maintaining full functionality. This two-layer vinyl overlay pairs a dark smoked base with a black honeycomb M-inspired pattern. Installs easily over the factory reflector, no removal needed. Made from durable 3.2 mil outdoor vinyl, precision-cut for an exact fit. Includes overlays, instructions, and a limited lifetime warranty.

BMW Mirror Overlay

Taillight Overlay Kits

The BLACKLINE Taillight Overlay Kit adds a subtle, modern smoked finish to the reverse signal area of your taillights. Available in standard or 'Lite' shades to suit your style, these kits are designed to fit various BMW models. Made from durable 3.2 mil outdoor vinyl for easy installation and long-lasting performance.

BMW
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