New 8" Dual Diaphragm zinc plated power brake booster, master cylinder & Adjustable Proportioning Valve. 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 & Adjustable Proportioning Valve equipped to work with disc/drum or disc/disc applications.