New 9" chrome plated power brake booster and Flat Top master cylinder combo. This 9" 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 Chrome aluminum 1-1/8" bore GM master cylinder equipped to work with front disc / rear drum or 4 wheel disc brake applications.