9" Chrome-Plated Power Brake Booster Kit with 1-1/8" Bore Cast Iron Master Cylinder, Chrome Lid, Side Mount Valve for Disc/Disc GM AFX

Upgrade your vehicle’s braking system with the LEED Brakes 9-Inch Chrome-Plated Power Brake Booster, Master Cylinder, and Disc/Disc Proportioning Valve Combo. This premium kit features a 9" power brake booster that is meticulously hand-polished before receiving a high-quality chrome finish for exceptional durability and appearance.

Designed for direct mounting to your factory firewall, this booster enhances both performance and under-hood aesthetics. The kit includes a 1-1/8" bore cast iron master cylinder and a proportioning valve engineered specifically for 4-wheel disc brake applications, ensuring balanced braking and improved stopping performance.

Ideal for a wide range of GM AFX body vehicles, this combo delivers a significant upgrade in braking capability while maintaining a clean, factory-style installation.

Chrome GM AFX 9-Inch Power Brake Booster – 4-Wheel Disc/Disc 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: Single Diaphragm


• Brake Booster Diameter (in): 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 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.