Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededLEED BRAKESPART NUMBER: 633-4R6B4
1960-1966 GM Trucks Power Brake Master Cylinder & Booster Kit
$47249$524.99You Save$52.50
Ships on Sep 14, 2026
Lowest Price GuaranteeGM Chrome 9 in. Boosters
Power Brake Master Cylinder & Booster Kit1960-1966 GM Trucks Chrome Flat Top 1 in. Master Cylinder Chrome 9 in. Booster Chrome Disc/Disc Proportioning Valve
LEED Brakes 4R6B4 Features:
New 9" chrome plated power brake booster, master cylinder & 4 wheel disc valve combo. This 9" power booster is hand polished before a chrome finish is applied for a top quality finish. The top quality power brake booster is designed mount directly to your factory firewall. Also included in this kits is a new chrome 1-1/8" bore flat top master cylinder and 4 wheel disc valve equipped to work with front disc/rear drum brake applications.- New unit not remanufactured
- Includes brackets and pushrod
Optimize the Stopping Power of Your Brakes
Leed Power Brake Master Cylinder and Booster Kits are designed to transform the manual brake system on your classic muscle car by increasing braking response while keeping OE-styling. Trust Leed to improve the performance and safety of your brakes.
Part TypeBrake Master Cylinder and Booster Assembly
Product LineLeed Power Brake Master Cylinder & Booster Kits
BrandLEED BRAKES
Package Width19.0
Weight19.0 PG
Part CategoryPerformance Parts
Brake Booster FinishChrome
Bracket IncludedYes
Brake Booster TypeSingle Diaphragm
Master Cylinder FinishChrome
Housing MaterialSteel
Brake Booster IncludedYes
Master Cylinder Bore Size1-1/8 in
Mounting Hardware IncludedNo
Master Cylinder Port Quantity4
Brake Booster Diameter9 in.
Booster Housing Diameter9 in.
Bleeder Hoses IncludedYes
Brake Pedal Pushrod IncludedYes
Master Cylinder MaterialAluminum
Master Cylinder Cap IncludedYes
Booster Diaphragm TypeSingle
Brake Lines IncludedFrom Master Cylinder to Valve
Booster TypeVacuum
Master Cylinder IncludedYes
Part FitmentSemi Universal
Vendor Part Number4R6B4
Package Qty1
Package TypeEA
No Questions
No Reviews
Some parts are not legal for use in California or other states with similar laws / regulations
