The 7/8" bore brake master cylinder with integral reservoir has been designed to exceed the needs of late models, open wheel modifieds, sprints & midgets as well as specialty market applications. These lightweight master cylinders offer many features that chassis builders and racers will benefit from. Each master cylinder offers an external return spring providing positive pedal feel, reducing excessive pad wear. Also, the tough aluminum bore houses a hard anodized piston for long service life. Dual bolt patterns also offer mounting options builders will appreciate. AFCOs integral reservoir master cylinder will deliver years of dependable stopping performance. California Proposition 65 Statement