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![Power Brake Booster/Master Cylinder Conversion Kit Fits Select 1964-1972 Buick, Chevy, Olds, Pontiac A/F-Body Models [Disc/Drum]](https://www.jegs.com/images/mini_750/500/555/555-631431.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-631431
Power Brake Booster/Master Cylinder Conversion Kit Fits Select 1964-1972 Buick, Chevy, Olds, Pontiac A/F-Body Models [Disc/Drum]
$18899$204.09You Save$15.10
Ships on Sep 15, 2026
Lowest Price GuaranteeGM Car, Disc Front & Drum Rear
Power Brake Booster/Master Cylinder Conversion KitFits Select 1964-1972 Buick, Chevy, Olds, Pont A/F-Body See Fitment Tab for All Applications Disc/Drum 1 in. Bore Master Cyl. 9 in. Single Diaphragm Booster Zinc Sold as a Kit
JEGS 555-631431 Power Brake Booster/Master Cylinder Conversion Kit Features:
- Fits select 1964-1972 Buick, Chevy, Oldsmobile, Pontiac A, F-body models
- For front brake disc/rear brake 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
- 9 in. vacuum single-diaphragm brake booster
- 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 Height9.9
Package Width11.5
Package Length14.2
Weight19.15 PG
Part CategoryReplacement Parts
Master Cylinder StrokeN/A
Brake Booster TypeVacuum single diaphragm
Master Cylinder FinishNatural
Master Cylinder Bore Size1.000 in. (25.4 mm)
QuantitySold as a kit
Mounting Hardware IncludedYes
Brake Pedal Rod Extension IncludedYes
Bowl DesignDual
Brake Booster Diameter ( In.)9.00 in. (228.6 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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Some parts are not legal for use in California or other states with similar laws / regulations
