SKU: LEE034
MPN: 034
The 9in Brake Booster with 1in Master Cylinder in Black from LEED BRAKES is engineered for hot rod builders, classic car restorers, and performance enthusiasts who demand reliable stopping power in compact engine bays. This brake booster assembly solves a critical challenge: fitting modern hydraulic braking performance into vintage vehicles or custom builds where space is limited. Whether you're installing a modern brake system into a 1960s muscle car or engineering a lightweight track-focused platform, this booster delivers the hydraulic advantage ratio needed to minimize pedal effort without sacrificing responsiveness.
The 9-inch diameter booster housing amplifies brake line pressure through vacuum assist, reducing the pedal force required for consistent braking across a range of driving conditions. The integrated 1-inch master cylinder bore is sized for vehicles requiring moderate brake line volumes—a common sweet spot for single-circuit or dual-circuit applications in mid-weight performance builds. Black powder-coat finish resists corrosion and provides a factory-quality appearance that blends seamlessly into traditional engine bay aesthetics. At 14.4 lbs, this assembly is lightweight enough for weight-conscious builds while maintaining the structural rigidity necessary for high-cycle brake applications, offering the mechanical advantage of vacuum-assist technology without the bulk of oversized boosters.
Mechanics and fabricators routinely specify this LEED BRAKES booster for street rods, restorations, and custom chassis where original brake systems are inadequate or non-functional. Its compact footprint fits tight firewall-to-engine configurations common in vintage conversions, while the standard 1-inch master cylinder bore integrates with both traditional and modern brake line diameters. Proper installation requires vacuum source verification—ensure your engine block or intake manifold provides consistent manifold vacuum above 15 inches Hg at idle for optimal booster function. This assembly is compatible with drum or disc brake systems and works effectively with both natural and synthetic brake fluids meeting DOT 3 or DOT 4 specifications.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
