Speedway Motors Disc Drum Brake Booster and Master Cylinder Combo Compatible With 1955-1957 Chevy Car 8 Inch Dual Diaphragm 1 Inch Bore with Proportioning Valve Firewall Mount

When you put modern front disc brakes on your 55-57 Compatible with Chevy car, you should update the master cylinder as well. The stock 55-57 drum brake master cylinder does not have the capacity to supply the proper amount of pressure for front disc brakes. This simple bolt-on power brake assembly will ensure your brakes are operating at peak performance. Kit contains a 1" bore master cylinder with 1/2"-20 and 9/16"-18 outlets, 8" dual diaphragm booster, and a disc/drum combination valve (provides proportioning and metering). Also includes line to connect the prop/metering block to the master cylinder and the necessary hardware to mount the booster to your original 55-57 Compatible with Chevy brake pedal. Measures 14-1/4" from firewall bracket to end of master cylinder. Includes proportioning/metering valve. Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection. Installation Instructions

• Complete Power Brake Kit: Includes 1-inch bore master cylinder, 8-inch dual diaphragm booster, and disc/drum combination valve
• Vehicle Fitment: Designed specifically for 1955–1957 Compatible with Chevy passenger cars upgrading to front disc brakes
• Hydraulic Ports: Master cylinder features 1/2"-20 and 9/16"-18 outlet ports for proper disc/drum brake system flow
• Bolt-On Installation: Supplied with mounting hardware and connecting line to attach directly to the original Tri-Five brake pedal
• Compact Assembly: Measures 14-1/4 inches from firewall bracket to end of master cylinder for clean firewall mounting