Bexar Pro Components Universal GM-Style Cast Iron Master Cylinder | 1-1/8-Inch Bore
SKU: BPC-MC1321H
Bexar Pro Components GradeIn Stock: Ships in Neutral Industrial Packaging
“Precision engineered to restore maximum stopping force for both heavy-duty fleet reliability and premium automotive applications.”
Transition your vintage platform to a secure modern footprint with the Bexar Pro Components Premium Cast Iron Master Cylinder. Explicitly built for universal light-duty truck and commercial utility variants, this layout optimizes reliable line pressure across traditional hydraulic configurations. Engineered to deliver unyielding line pressure stability and excellent fluid displacement performance under continuous heavy vocational cycles. Only include the master cylinder installation guide link for BRAKE master cylinders; do not include it for OTHER PRODUCTS. View Master Cylinder Installation Guide
| Specification | Detail |
|---|---|
| Component Type | Dual-Reservoir Hydraulic Master Cylinder |
| Bore Size | 1-1/8-Inch Bore Diameter |
| Material | Durable Heavy-Duty Cast Iron Housing |
| Fluid Outlets | Dual Side Ports (Industry-Standard INV Flare Fittings) |
| Mounting Format | Universal GM-Style 2-Bolt Flange Interface |
| Includes reservoir caps and fluid seals |
🛠️ 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 cast iron bores create persistent spongey pedal issues.
- Pushrod Depth: Always verify piston cup depth against your existing brake pedal pushrod length to ensure full travel range before final hydraulic hard-line torque sequences.
- Fluid Compatibility: Use clean DOT 3 or DOT 4 brake fluid only.
CRITICAL: Verify Specifications
Ensure your existing hydraulic system uses inverted flare (INV) fitting interfaces. Standard metric or pipe-thread adapters will fail to seat correctly inside the cast iron bore ports, leading to catastrophic system pressure failure.
| Weight | 9 lbs |
|---|---|
| Dimensions | 10 × 6 × 6 in |
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