Wilwood’s Tandem Aluminum Master Cylinder is available in 4 bore sizes from 7/8″” to 1-1/8”; and 3 finishes, plain, ball burnished and black e-coat. They’re designed to fit most mounting flanges, and feature outlet ports both sides, for multiple plumbing options. 7/8” & 15/16″” bore master cylinders are availble with various pushrod options.