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![Power Brake Conversion Kit Fits Select 1955-1958 Chevrolet Full Size Models [Disc/Drum]](https://www.jegs.com/images/mini_750/500/555/555-631174.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-631174
Power Brake Conversion Kit Fits Select 1955-1958 Chevrolet Full Size Models [Disc/Drum]
$21999$241.99You Save$22.00
Ships on 09/11/2026
Lowest Price GuaranteeGM Car, Disc Front & Drum Rear
Power Brake Conversion KitFits Select 1955-1958 Chevy Full Size Models See Fitment Tab for All Applications Disc/Drum 1 in. Bore Master Cyl. 8 in. Dual Diaphragm Booster Brass Proportioning Valve Zinc Finish (Gold) Sold as a Kit
JEGS 555-631174 Power Brake Conversion Kit Features:
- Fits 1955-1958 Chevrolet Bel Air, 1958 Chevrolet Biscayne, 1958 Chevrolet Brookwood, 1957-1958 Chevrolet Del Ray, 1958 Chevrolet Impala, 1955-1958 Chevrolet Nomad, 1955-1957 Chevrolet One-Fifty Series, 1958 Chevrolet Yeoman
- For front disc and rear drum applications only
- 1 in. bore dual-bowl master cylinder for improved hydraulic performance
- 9/16 in.-18 and 1/2 in.-20 master cylinder outlets
- 8 in. vacuum dual-diaphragm brake booster
- 3/8 in.-24 and 9/16 in.-18 proportion valve outlets
- Steel brake booster construction provides strength and long service life
- Includes brake pedal rod extension and required mounting hardware
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 Height14.0
Package Width15.0
Package Length15.0
Weight25.0 PG
Part CategoryReplacement Parts
Brake Booster TypeVacuum dual diaphragm
Master Cylinder FinishNatural
Master Cylinder Bore Size1 in. (25.4 mm)
QuantitySold as a kit
Mounting Hardware IncludedYes
Brake Pedal Rod Extension IncludedYes
Bowl DesignDual
Brake Booster Diameter ( In.)8 in. (203.2 mm)
Rear Brake TypeDrum
Brake Booster MaterialSteel
Master Cylinder MaterialIron
Master Cylinder Cap IncludedYes
Front Brake TypeDisc
Reservoir MaterialIron
Part FitmentDirect Fit
Reservoir IncludedYes
Package Qty1
Package TypeEA
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