Power booster kit 8 inch dual booster 1-1/8 inch bore master (Chrome) Upgrade your 73-87 Chevrolet or GMC truck to a 8 in. dual diaphragm cchrome power booster and 1-1/8 in. bore master cylinder. This kit can be used to convert a manual brake truck to power brakes or used as a replacement for factory power brake equipped trucks. This 8" power booster is hand polished before chrome is applied for a top quality finish and the kit includes all the necessary brackets, hardware and pushrod components for an easy installation. The included master cylinder will work for both disc/drum and disc/disc applications. Direct bolt in replacement for factory power brake booster Includes brackets and pushrod .