New 8" Dual Diaphragm zinc plated power brake booster kit. This 8" power booster is hand polished before a yellow zinc finish is applied for a top quality finish. The booster mounting brackets are a direct fit to your factory firewall. Also Included in this kit is a new 1" bore master cylinder and adjustable valve perfect for most front disc /rear drum brake applications.*Note - Will not fit 1969-72 Factory Power Brake Cars.