7-Inch Zinc Dual Diaphragm Power Brake Booster with 1-1/8 Inch Bore Master Cylinder and Adjustable Proportioning Valve for GM AFX

Elevate your vehicle’s braking system with the LEED Brakes 7-Inch Dual Diaphragm Zinc-Plated Power Brake Booster, Master Cylinder, and Adjustable Proportioning Valve Kit. Each 7-inch power booster is meticulously hand-polished before receiving a durable yellow zinc finish, delivering long-lasting corrosion resistance and a high-quality appearance.

Designed for a direct mount to your GM vehicle’s factory firewall, this power brake booster simplifies installation while improving braking performance. The kit includes a new 1-1/8" bore master cylinder and an adjustable proportioning valve, making it compatible with both disc/drum and disc/disc brake systems.

This General Motors AFX body 7-inch brake booster kit enhances safety, reliability, and overall braking performance. Ideal for a wide range of classic GM vehicles from 1964–1974, including the Oldsmobile Omega, Chevrolet Nova, Buick Apollo, Pontiac Ventura, and similar AFX-body models.

Upgrade your GM vehicle with this precision-engineered brake booster kit for improved braking confidence and performance.

GM AFX 7" Dual Power Brake Booster Kit Highlights

• 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: Dual Diaphragm
• Brake Booster Diameter (in): 7 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 how to quickly test your measuring tool for accuracy.

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