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![Power Brake Unit Fits Select 1973-1987 Chevrolet & GMC Trucks, w/Cast Iron Master Cyl. & Proportioning Valve [Disc/Disc]](https://www.jegs.com/images/mini_750/500/555/555-631958.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-631958
Power Brake Unit Fits Select 1973-1987 Chevrolet & GMC Trucks, w/Cast Iron Master Cyl. & Proportioning Valve [Disc/Disc]
$41599$439.99You Save$24.00
Ships on 09/16/2026
Lowest Price GuaranteeGM Truck, Disc Front & Disc Rear
Power Brake UnitFits Select 1973-1987 Chevrolet & GMC Trucks See Fitment Tab for Applications Disc/Disc Includes:
- 11 in. Power Booster w/Brackets
- 1 1/8 in. Bore Master Cylinder
- Proportioning Valve
- Pedal Rod
JEGS 555-631958 Power Brake Unit Features:
- Fits 1973-1987 Chevy & GMC Trucks
- Front Disc and Rear Disc Applications
- Cast Iron 1 1/8 in. Bore Dual Reservoir Master Cylinder with Single Bail Cap
- Black Powder Coated 11 in. Dual Diaphragm Power Booster
- Power Booster Vacuum Port Connector
- Black Powder Coated Firewall Mounting Brackets
- Truck Pedal Rod Extension
- Brake Proportioning Valve for Disc/Disc Brakes
- Brake Warning Light Switch & Connector
Part TypeBrake Master Cylinder and Booster Assembly
BrandJEGS
Package Height16.0
Package Width18.0
Package Length22.0
Weight19.0 PG
Part CategoryReplacement Parts
Brake Booster FinishBlack Powder Coat
Brake Booster TypeDual Vacuum diaphragm
Master Cylinder FinishBlack Powder Coated
Mounting Hole Quantity4 holes
Brake Booster IncludedYes
Master Cylinder Bore Size1.125 in (28.575 mm)
Booster Mounting Bracket IncludedYes
QuantitySold as an Assembly
Mounting Hardware IncludedNo
Brake Booster Diameter11 in (279.4 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
Vendor Part NumberCT-215
Package Qty1
Package TypeEA
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