Goldenwrench Blackline Performance F5X Mini JCW / GP3 Engine Cap Set

The Goldenwrench Blackline Performance F5X Mini JCW / GP3 Engine Cap Set marks the first Blackline Performance product developed for the MINI platform. Designed and manufactured in-house to the same precision and quality standards seen across the Blackline Performance cap range, this set replaces the factory plastic oil cap and coolant tank cap with CNC-machined billet aluminum covers — delivering a cohesive, motorsport-inspired engine bay upgrade for the 2020+ MINI JCW and GP3.

Each cap in the set is CNC-machined from high-grade T6 aluminum and anodized in a race-inspired Edition Red finish, designed to complement the factory engine cover aesthetic of the JCW and GP3 models. All logos and design details are created using a precision 3D milling process, machined directly into each cap surface for a permanent, high-definition finish with no fading or peeling over time.

These are cap covers, not full replacements. Each piece affixes directly over the top of the factory oil cap and coolant tank cap in minutes, with no tools or modification required. Each set includes the billet oil cap cover, the billet coolant tank cap cover, and installation instructions.

Product Details

• Precision CNC-machined billet T6 aluminum construction
• Anodized Edition Red finish — complements factory JCW / GP3 engine cover
• 3D-milled Blackline Performance logos machined into each cap surface
• Set includes: billet oil cap cover + billet coolant tank cap cover
• Installs over factory caps — no modification required
• Includes installation instructions

Vehicle Applications

• 2020+ MINI John Cooper Works (JCW) — F55 / F56 / F57
• 2020+ MINI GP3 — F56

Notes

• These are covers that affix to the top of the factory caps — not full cap replacements
• Designed exclusively for 2020+ F5X MINI JCW and GP3 model vehicles