Bexar Pro Components 1963-1966 Chevy & GMC Truck 9-Inch Single Power Booster & Cast Iron Master Cylinder Kit | Disc-Drum Layout
SKU: BPC-CT-203
“Precision engineered to restore maximum stopping force for both heavy-duty fleet reliability and premium automotive applications.”
| Specification | Detail |
|---|---|
| Kit Type | Power Brake Booster Replacement Combo Package (Disc-Drum) |
| Booster Stance | 9-Inch Single Diaphragm Firewall Vacuum Assist Assembly |
| Booster Finish | Durable Black Anti-Corrosive Powder Coat Finish |
| Master Finish | Classic Heavy-Duty Raw Cast Iron Body Design |
| Reservoir Design | Dual Reservoir Deep Well Fluid System |
| Dual Side Ports featuring Industry-Standard INV Flare Fitting Connections |
🛠️ Expert Installation & Field Note
Based on our shop experience specializing in heavy-duty brakes since 1985:
- Pushrod Alignment: When installing firewall-mounted booster brackets, ensure your structural linkage aligns squarely with the manual pedal arm block. Even minor offset tracking friction creates premature pushrod wear or internal bore score leaks over time.
- Proportioning Valve Setup: Always configure an external proportioning distribution block if you run mismatched disc/drum brake layouts to properly regulate fluid balance pressures.
- Bleeding Sequence: Bench bleed the raw cast iron master cylinder body entirely before plumbing line integration.
This hydraulic boost kit requires a minimum vacuum supply threshold of 18 inches at idle to secure linear pedal assistance. Check line fitment clearance closely against custom intake manifold variants or left side inner fender aprons before system structural hard-mounting.

