Add to Cart 7in Brake Booster Zinc 1in Bore Master Cylinder LEED BRAKES MSRP: Now: $279.99 Was: Master Cylinder and Booster - 1 in Bore - Dual Integral Reservoir - 7 in OD - Single Diaphragm - Steel - Gold Zinc Plated - Ford Mustang 1964-66 - Kit LEE5H4