Dodge/Plymouth A, B & E Body Wilwood Master Cylinder, Booster and Proportioning Valve . Master cylinder is a polished Wilwood with machined black anodized top and is designed for use with disc/disc or disc/drum brakes. Booster is an 8 inch dual diaphragm which offers better stopping than single diaphragm boosters and holds more vacuum than 7 inch boosters. Kit also includes Wilwood adjustable proportioning valve with mounting bracket and stainless brake lines. This complete kit is designed to bolt up to all 65-70 A-Body and 65-74 B and E-Body Dodge and Plymouth cars.