67-70 Ford Mustang Wilwood Black Master Cylinder with 9" Brake Booster and Proportioning Valve. Kit is designed to bolt up with no modifications. This master cylinder features black anodized finish with black machined aluminum top. Master cylinder outlets are 1/2-20 UNF and come with adapter fitting for 3/8-24 and 9/16-20. Kit includes Wilwood adjustable combination proportioning valve, p-valve bracket, stainless lines, stainless bolts with spacers and works with both disk/drum or disk/disk applications