9" Zinc-Plated Power Brake Booster with 1-1/8" Bore Master Cylinder, Side Mount Valve for Disc/Disc for 1955-1968 Chevrolet

Upgrade your 1955–1968 Chevy's braking system with this 9" Zinc Plated Power Brake Booster, Master Cylinder, and Disc/Disc Proportioning Valve Combo from LEED Brakes. This comprehensive kit is meticulously hand-polished before receiving a durable yellow zinc finish, ensuring long-lasting performance and a clean under-hood appearance. Designed for a direct fit to your factory firewall, installation is straightforward and efficient.

Included in this kit is a new 1-1/8" bore cast iron master cylinder and a side-mount proportioning valve specifically engineered for 4-wheel disc brake applications. This configuration provides balanced braking performance, improved pedal feel, and enhanced stopping power for your classic Chevrolet.

Compatible with a wide range of 1955–1968 Chevrolet models including Impala, Bel Air, Nomad, and other full-size Chevy platforms, this zinc-plated 9-inch power brake booster kit is a reliable upgrade for improved safety and performance.

9" GM Zinc Power Brake Booster Kit Specifications

• Master Cylinder Bore Size: 1-1/8 in
• Bowl Design: Dual Bowl
• Master Cylinder Material: Cast Iron
• Master Cylinder Finish: Natural
• Reservoir Included: Yes
• Reservoir Material: Cast Iron
• Master Cylinder Cap Included: Yes
• Brake Booster Type: Single Diaphragm
• Brake Booster Diameter: 9 in.
• Brake Booster Material: Steel
• Brake Booster Finish: Zinc
• Brake Pedal Rod Extension Included: Yes
• Mounting Hardware Included: Uses Original
• Quantity: Kit

LEED Brakes Pushrod Measuring Tool PSA Video

All LEED Brakes booster and master cylinder assemblies are preset before shipping. Watch this short video to learn how to properly measure pushrod depth and verify measuring tool accuracy.

Click here to learn more about why LEED Brakes has added this warning to their products.