Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
![Power Brake Unit Fits Select 1973-1987 Chevy/GMC Trucks, w/Aluminum Master Cylinder & Proportioning Valve, Chrome [Disc/Drum]](https://www.jegs.com/images/mini_750/500/555/555-631965.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-631965
Power Brake Unit Fits Select 1973-1987 Chevy/GMC Trucks, w/Aluminum Master Cylinder & Proportioning Valve, Chrome [Disc/Drum]
$55199$582.99You Save$31.00
Ships on 09/15/2026
Lowest Price GuaranteeGM Truck, Disc Front & Drum Rear
Power Brake UnitFits Select 1973-1987 Chevy & GMC Trucks See Fitment Tab for Applications Disc/Drum Chrome Finish Includes:
- 8 in. Power Booster w/Brackets
- 1 in. Bore Alum. Master Cyl.
- Proportioning Valve
- Pedal Rod
JEGS 555-631965 Power Brake Unit Features:
- Fits 1973-1987 Chevy & GMC Trucks
- Front Disc and Rear Drum Applications
- Chrome Plated Aluminum 1 1/8 in. Bore Dual Reservoir Master Cylinder with Oval Cap
- Chrome Plated 8 in. Dual Diaphragm Power Booster
- Power Booster Vacuum Port Connector
- Black Powder Coated Firewall Mounting Brackets
- Truck Pedal Rod Extension
- Chrome Bottom Mount Proportioning Valve Kit
- Brake Warning Light Switch & Connector Pre-Bent Brake Lines & Bracket
- (2) 3/8 in.-24 & (1) 9/16 in.-20 fitting needed to install valve
Improve Your Stopping Distance with a Power Brake Conversion Kit
JEGS power brake conversion kits provide better stopping distance to increase vehicle safety by transforming your manual brakes into an improved power-assisted system. All power brake conversion kits include a master cylinder, power brake booster, mounting brackets, and other necessary components for easy installation. We offer several style options to meet your brake improvement needs.
Part TypeBrake Master Cylinder and Booster Assembly
Product LineJEGS Power Brake Booster Conversion Kits
BrandJEGS
Package Height10.9
Package Width13.0
Package Length15.25
Weight14.5 PG
Part CategoryReplacement Parts
Brake Booster FinishChrome Plated
Brake Booster TypeDual Vacuum diaphragm
Master Cylinder FinishChrome Plated
Mounting Hole Quantity4 holes
Brake Booster IncludedYes
Master Cylinder Bore Size1 in (25.4 mm)
Booster Mounting Bracket IncludedYes
QuantitySold as an Assembly
Mounting Hardware IncludedNo
Brake Booster Diameter8 in (203.2 mm)
Brake Pedal Rod Extension IncludedYes
Bowl DesignDual
Rear Brake TypeDisc
Brake Booster MaterialSteel
Master Cylinder MaterialAluminum
Master Cylinder Cap IncludedYes
Front Brake TypeDisc
Reservoir MaterialAluminum
Master Cylinder IncludedYes
Part FitmentSemi Universal
Reservoir IncludedYes
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![1003793 DOT 3 Brake Fluid [12 oz.]](https://www.jegs.com/images/mini_200/700/708/708-1003793.jpg)
Some parts are not legal for use in California or other states with similar laws / regulations
