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![Brake Master Cylinder, Cast-Iron with Natural Finish [GM Universal Mounting] 1 1/8 in.](https://www.jegs.com/images/mini_750/500/555/555-631155.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-631155
Brake Master Cylinder, Cast-Iron with Natural Finish [GM Universal Mounting] 1 1/8 in.
$6238$72.99You Save$10.61
Ships on 09/14/2026
Lowest Price GuaranteeBrake Master Cylinder
Brake Master CylinderGM Universal Mounting Disc/Disc Applications 1 1/8 in. Bore 9/16 in.-18 & 1/2 in.-20 Ports Cast-Iron Natural Finish
JEGS 555- 631155 Brake Master Cylinder Notes:
- Includes shallow bore adaptor
- Center mounting holes 3-3/8 in.
- The piston adaptor on the Master Cylinder enables both power and manual applications.
- The universal fit is made for disc brake conversions with a dual bail fluid compartment
Replacement Brake Parts For You When You Need Them!
Rotors, calipers, hoses, and other brake parts need to be replaced on a regular basis. Keep your brake system maintained with JEGS Replacement Brake Parts.
Part TypeMaster Cylinder
Product LineJEGS Brake Conversion Kit Replacement Parts
BrandJEGS
Package Height8.0
Package Width8.0
Package Length14.0
Weight10.0 PG
Part CategoryPerformance Parts
Master Cylinder Cap IncludedYes
MaterialCast Iron
Part FitmentSemi Universal
Reservoir IncludedYes
Bore Diameter1.125 in (28.575 mm)
FinishNatural
Vendor Part NumberMC2912H
Package Qty1
Package TypeEA
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