Bexar Pro Components Universal Chrome Oval Master Cylinder Kit | 1-Inch Bore | Aluminum Proportioning Valve | Disc-Drum
SKU: BPC-MCK260-8555C-2B
“Precision engineered to restore maximum stopping force for both heavy-duty fleet reliability and premium automotive applications.”
| Specification | Detail |
|---|---|
| Component Type | Dual-Reservoir Oval Master Cylinder + Proportioning Kit |
| Master Style | High-Luster Polished Chrome Oval Design |
| Bore Size | 1-Inch Bore Diameter |
| System Type | Standard Disc-Drum Proportional Staging |
| Material | Aluminum Proportioning Block & Chrome Master |
| Includes essential hard-line plumbing adapters |
🛠️ Expert Installation & Field Note
Based on our shop experience specializing in heavy-duty brakes since 1985:
- Bench Bleeding: Never skip bench bleeding the master cylinder assembly on a vice before mounting to the firewall or booster face. Trapped air pockets inside the bores create persistent spongey pedal issues.
- Proportioning Valve Setup: Always configure the external proportioning distribution block properly to regulate fluid balance pressures between front and rear circuit lines.
- Fluid Compatibility: Use clean DOT 3 or DOT 4 brake fluid only.
Ensure your existing hydraulic system uses inverted flare (INV) fitting interfaces. Standard metric or pipe-thread adapters will fail to seat correctly inside the master ports, leading to catastrophic system pressure failure.

