New 8" Dual Diaphragm chrome plated power brake booster, master cylinder & adjustable proportioning valve combo. This 8" power booster is hand polished before a chrome finish is applied for a top quality finish. The black powder coated mount and pushrod assembly is a direct fit to your factory firewall for that fresh factory look. Also included in this Ford F100 chrome 8-inch dual booster kit is a new chrome 1-1/8" bore flat top master cylinder and adjustable proportioning valve equipped to work with 4 wheel disc & front disc / rear drum brake applications.