9in Brake Booster Zinc 1-1/8in Bore MC

The 9in Brake Booster Zinc 1-1/8in Bore MC from LEED BRAKES is a heavy-duty hydraulic brake assist component engineered for street rods, classics, and modern swap applications where OEM power brake systems aren't available or compatible. This unit delivers the consistent pedal effort reduction that separates comfortable daily driving from exhausting manual-only brake work, making it essential for any serious brake system upgrade or restoration project.

Built with a 1-1/8-inch bore master cylinder interface, this 9-inch vacuum booster features a zinc-plated steel construction that resists corrosion in engine bay environments and maintains consistent hydraulic multiplication across thousands of brake cycles. The booster uses engine vacuum to amplify pedal input, reducing driver fatigue while maintaining precise brake modulation—a critical advantage when running modern disc brake systems on vintage platforms. At 19.2 pounds and compact at 11.5 x 11.2 x 18.5 inches, it fits tight engine compartments without sacrificing performance or reliability.

Mechanics and fabricators choose LEED BRAKES boosters for custom brake system builds where factory power brake options are discontinued or incompatible. This unit pairs perfectly with matching master cylinders and proportioning valves to create a fully integrated hydraulic braking system on street rods, early hot rods, and vintage trucks. Verify your master cylinder bore size and vacuum line routing before installation to ensure proper system balance and safe operation across all driving conditions.