Check the listing for details. Speedway 9 in. Dual Power Brake Booster Kit for Chevelle/Camaro/Nova. Condition: New. Listed at 416.99 USD. Complete Power Brake Upgrade: All-in-one dual power brake conversion kit designed for GM A-Body platforms including Chevelle, Camaro, and Nova applications, Dual Vacuum Booster: GM-style 9 inch dual diaphragm booster delivers strong, consistent braking performance with a durable black coated finish, Oval Master Cylinder Design: Black polished aluminum oval flat-top tandem master cylinder provides modern styling and reliable hydraulic operation, Proportioning Valve System: Includes lightweight aluminum disc/drum proportioning valve with stainless steel lines for balanced brake pressure, Bolt-On Installation Components: Kit includes angled booster bracket, pedal rod extension, clevis, and mounting hardware for straightforward installation.