7-Inch Chrome Dual Diaphragm Power Brake Booster Kit with 1-1/8-Inch Bore Master Cylinder & Adjustable Proportioning Valve for 1970–1981 Chevy Camaro & Pontiac Firebird

Upgrade the braking system of your 1970-1981 Chevrolet Camaro or Pontiac Firebird with this 7" chrome dual diaphragm power brake booster, master cylinder, and adjustable proportioning valve kit from LEED Brakes. Designed for classic GM F-Body vehicles, this combination pairs a compact chrome-plated power brake booster with a 1-1/8" bore flat top master cylinder and adjustable proportioning valve.

The 7" dual diaphragm booster features a steel housing that is hand-polished before chrome plating for a high-quality finish. Designed to mount directly to the factory firewall, the booster offers a compact design and a clean, custom appearance under the hood.

The included chrome aluminum dual-bowl master cylinder features a 1-1/8" bore and flat top design. An adjustable proportioning valve provides additional flexibility for compatible front disc/rear drum and four-wheel disc brake applications by allowing rear brake pressure to be adjusted as needed.

GM F-Body Chrome Power Brake Booster Kit Specifications

• Vehicle Application: 1970-1981 Chevrolet Camaro and Pontiac Firebird
• Master Cylinder Bore Size: 1-1/8 in.
• Master Cylinder Design: Dual Bowl, Flat Top
• Master Cylinder Material: Aluminum
• Master Cylinder Finish: Chrome
• Reservoir Included: Yes
• Reservoir Material: Aluminum
• Master Cylinder Cap Included: Yes
• Brake Booster Type: Dual Diaphragm
• Brake Booster Diameter: 7 in.
• Brake Booster Material: Steel
• Brake Booster Finish: Chrome
• Proportioning Valve: Adjustable
• Mounting Location: Factory Firewall
• Mounting Hardware: Uses Original
• Quantity: Kit

Adjustable Proportioning Valve for Brake System Tuning

Unlike fixed disc/drum or disc/disc proportioning valve combinations, this kit includes an adjustable proportioning valve that allows you to fine-tune rear brake pressure for your vehicle's braking setup.

This configuration is suitable for many compatible front disc/rear drum and four-wheel disc brake applications. Proper brake system configuration and adjustment are essential for safe braking performance.

Chrome Finish and Factory Firewall Mounting

The chrome-plated 7" dual diaphragm booster and matching master cylinder provide a polished appearance for restored and custom Camaro and Firebird engine compartments. The booster is designed for direct mounting to the factory firewall using your vehicle's original mounting hardware.

Compatible GM F-Body Vehicles

• 1970-1981 Chevrolet Camaro
• 1970-1981 Pontiac Firebird

Verify your vehicle's brake configuration and fitment before ordering.

LEED Brakes Pushrod Measuring Tool PSA Video

LEED Brakes booster and master cylinder assemblies are preset before shipping. Watch this short video to learn how to properly measure pushrod depth and test your measuring tool for accuracy. Incorrect pushrod measurements can contribute to brake drag.

Learn more about why LEED Brakes has added this warning to its products.