Product details:

Right Stuff Detailing PB9021C: Brake Booster, Steel, 9.00 in., Chrome, w/Bracket, w/o Stamp, GM, 1964-66, Each - Right Stuff Detailing brake boosters offer more power-assist. If you're pushing your brake to the floor, or you've lost that vacuum feeling, may need to replace your brake booster. Right Stuff Detailing brake boosters are made from quality materials to help you stop your vehicle with minimal pressure to your brakes. A brake pedal rod extension is included with some models. Order the universal or vehicle-specific brake boosters designed for your application.