New 8" Dual Diaphragm zinc plated power brake booster, master cylinder & disc/drum proportioning valve combo. This 8" power booster is hand polished before a yellow zinc finish is applied for a top quality finish. The top quality power brake booster is designed mount directly to your factory firewall. Also included in this kits is a new 1-1/8" bore master cylinder and proportioning valve equipped to work with front disc rear drum brake applications.