9" Chrome-Plated Power Brake Booster with 1-1/8" Bore Flat Top Master Cylinder and Side Mount Valve for Disc/Drum 1955-1968 Chevrolet

Upgrade your 1955–1968 Chevrolet with LEED Brakes' 9" chrome-plated power brake booster, master cylinder, and disc/drum proportioning valve combo. Designed for classic models including Impala, Caprice, Biscayne, Bel Air, and more, this premium kit enhances braking performance while maintaining a clean, vintage-correct appearance.

The 9" power booster is hand-polished before a durable chrome finish is applied for long-lasting protection and show-quality appeal. Engineered for direct mounting to your factory firewall, this booster delivers a precise fit and straightforward installation.

Included is a chrome 1-1/8" bore flat-top aluminum master cylinder with dual bowl design, polished finish, and aluminum reservoir, along with a proportioning valve optimized for front disc/rear drum brake applications. This combination provides improved pedal feel, balanced braking, and dependable stopping power.

1955–1968 Chevrolet 9" chrome Power Brake Booster Kit Specifications

• Master Cylinder Bore Size: 1-1/8 in.
• Bowl Design: Dual Bowl
• Master Cylinder Material: Aluminum
• Master Cylinder Finish: Polished
• Reservoir Included: Yes
• Reservoir Material: Aluminum
• Master Cylinder Cap Included: Yes
• Brake Booster Type: Single Diaphragm
• Brake Booster Diameter: 9 in.
• Brake Booster Material: Steel
• Brake Booster Finish: Chrome
• 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.