Wilwood 260-14388-BK Remote Tandem Outlet Master Cylinder With Pushrod With 1" Bore and Black E-Coat Finish, Compatible with Mid-1960s and Newer Domestic Vehicles *** Wilwood's new Remote Tandem Master Cylinder w/ Pushrod is available in 4 bore sizes 7/8", 15/16", 1.00" and 1.12" and in two finishes: ball burnished and black e-coat. They're designed for mount flanges from 3.22" to 3.40", common measurements for most domestic cars and trucks from the mid-1960s to present, and offer fluid outlet ports on both sides of the bore. The stroke is set at 1.12" 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 our combination proportioning valve kit, which includes brackets and stainless lines specifically for use with these master cylinders, see P/N WIL-260-14248 for a retrofit kit.