New 7" Dual Diaphragm chrome plated power brake booster, master cylinder & disc/drum proportioning valve combo. This 7" power booster is hand polished before a chrome 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 cast iron 1-1/8" bore master cylinder with chrome lid and proportioning valve equipped to work with front disc rear drum applications.