Wilwood’s Tandem Aluminum Master Cylinder for Mustangs comes with the correct pushrod; a 7/8" or 15/16" bore, and is available in 3 finishes; plain, ball burnished, and black e-coat. These master cylinders are designed primarily for manual applications and include the correct pushrod for the factory 64-72 brake pedal. They’re designed for mount flanges from 3.22” to 3.40”, which match the 64-72 factory manual master cylinder mount, and offer fluid outlet ports on both sides of the bore. The stroke is set at 1.10” with a volume ratio of 2:1 between the primary and secondary chambers. Machined from high-pressure die castings, each master cylinder weighs only 3lbs, a 75% weight savings over most cast iron OE type master cylinders. We also offer a combination proportioning valve kit, which includes brackets and stainless lines specifically for use with this master cylinder, see PN 260-13190, or 220-13189 for retrofit kit
The master cylinder reservoir should always hold enough fluid to allow the brake pads to completely wear away without the risk of running out of fluid. As a disc brake pad wears, the caliper piston will extend out of its bore. As the caliper piston extends, the master cylinder fluid level will drop in order to fill the caliper bore with brake fluid. If the reservoir is too small, there is a possibility that the master cylinder can run out of fluid and the brakes will fail.
