The RacingLine Brake Fluid Cap is designed to maintain optimal pressure equalization in your brake master cylinder, ensuring your high-performance braking system operates flawlessly. This cap is particularly beneficial for vehicles equipped with big brake kits used on track, where rapid pad wear can lead to negative pressure in the master cylinder. Our replacement cap features an advanced pressure equalization system, superior to the factory cap, to prevent pressure variance.

Crafted as a billet replacement, this cap is engineered to replace the standard plastic version. Unlike simple covers that merely stick onto the existing cap, this full replacement is meticulously machined using the latest CNC 5-axis technology. Each cap begins as a solid billet of 6061 aerospace-grade aluminum, is hand-polished, and then gloss-anodized in Midnight Black with laser-etched logos for enduring beauty.