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![Brake Master Cylinder Kit with Adjustable Proportioning Valve [Universal Mounting]](https://www.jegs.com/images/mini_750/500/555/555-631394k.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-631394K
Brake Master Cylinder Kit with Adjustable Proportioning Valve [Universal Mounting]
$27598
1 left in stock
Ships on Oct 19, 2026
Lowest Price GuaranteeUniversal Cast Aluminum Brake Master Cylinders
Brake Master Cylinder KitUniversal Mounting 1 1/8 in. Bore Includes:
- Chrome Aluminum Master Cylinder w/Dual Reservoir
- Adjustable Proportioning Valve
JEGS 555-631394K Master Cylinder Kit Includes:
- (1) JEGS Chrome Plated Aluminum Master Cylinder 555-631394
- (1) JEGS Adjustable Proportioning Valve 555-63023
Direct-Fit & Universal Brake Master Cylinders
JEGS offers a wide variety of brake master cylinders for direct fit or universal applications. Whether you're looking for a chrome unit to make your engine bay shine or just a replacement to get your vehicle back on the road, we have you covered. All units are manufactured using NEW not remanufactured high-quality materials and finishes to provide years of braking service.
Part TypeMaster Cylinder
Product LineJEGS Brake Master Cylinders
BrandJEGS
Part CategoryPerformance Parts
Port Quantity2
Hardware IncludedNo
Remote ReservoirNo
Mounting Flange Center To Center Distance (In.)3.375
Master Cylinder FinishChrome
Mounting Hole Quantity2 holes
Master Cylinder Bore Size1.125 in (28.575 mm)
QuantitySold individually
Bore Diameter1.125 in (28.575 mm)
Forward Outlet Size1/2-20 IF (Inverted Flare)
Brake SystemManual or Power
Master Cylinder Cap IncludedYes
Pushrod IncludedNo
Front Brake TypeVarious - Application Specific
Reservoir MaterialAluminum
Part FitmentSemi Universal
Reservoir IncludedYes
Rearward Outlet Size9/16-18 IF (Inverted Flare)
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
