New Brake Master Cylinder 1-1/8-inch bore size FD4887
Bexar Pro Components: Heavy-Duty Reliability for Fleet & Industry.
Key Specifications & Expert Features
- Bore Diameter: 1-1/8-inch bore size (Essential for pressure calibration)
- Outlet Size: 1/2-20 INV (Standard thread for direct line connection)
- Application: Heavy-duty automotive and industrial machinery.
- Companion Repair Kit: 25MK (View Compatible Kit)
Verified Casting & Part Numbers
Matching your existing part number is the most reliable method to ensure correct fitment. This unit replaces:
- FD4887
Expert Installation & Field Note
Based on our shop experience specializing in heavy-duty brakes since 1985: Proper pushrod free-play is vital, particularly in vehicles that see constant use. Lack of free-play can block the compensating port, leading to pressure buildup and eventual brake drag. Ensure total linkage alignment to prevent side-loading and maximize cylinder life.
⚠ CRITICAL: Verify Specifications
To ensure safety, verify that this master cylinder’s 1-1/8-inch bore size and 1/2-20 INV outlet match your existing unit before purchasing.





