Goldenwrench Blackline Performance BMW M Car Series Charge Cooler Tank Cap Cover

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.

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.

Product Details

• Precision CNC-machined billet T6 aluminum construction
• Available anodized finishes: Edition Red, Anthracite Grey, Motorsport Blue
• 3D-milled Blackline Performance logos machined into cap surface
• Designed for BMW M models equipped with S55 and S63 engines
• Installs over factory charge cooler coolant cap no modification required
• Includes billet cap cover and installation guide