MPA Electrical B1125 Power Brake Booster

Reman Vacuum Brake Booster for Corvette

The MPA Electrical B1125 is a remanufactured vacuum power brake booster built for 1968-1976 Chevrolet Corvette applications. It is engineered for strong braking assist with reduced pedal effort, making it a direct replacement choice for Corvette brake service work.

MPA Electrical’s Reman Vac Pwr Brake Booster w/o Master Cyl line focuses on replacement boosters that are tested for vacuum sealing and pressure transfer performance. This B1125 unit follows that approach with remanufactured construction and end-of-line testing for consistent operation.

Key Features

• Remanufactured vacuum power brake booster
• Standard replacement brake service grade
• Dual diaphragm design for braking assist
• Metal housing construction
• 8.76 in. diaphragm diameter
• Master cylinder not included
• No gasket or seal included
• No mounting bracket included
• 2 mounting studs with 3/8-16 master cylinder stud thread size
• Interchange reference: 338906

Detailed Description

MPA Electrical B1125 is a reman vacuum brake booster for Chevrolet Corvette models from 1968 through 1976. It is built as a standard replacement unit with a dual diaphragm layout to deliver braking assist through vacuum pressure, helping maintain a firm and responsive pedal feel. The metal housing and specially treated replacement components are used to support vacuum sealing and pressure transfer performance. This part number, B1125, is a direct fitment-focused option for Corvette brake system repair when the booster is the failed component and the master cylinder is being reused or sourced separately.

Common Problems This Part Can Address

• Hard brake pedal feel
• Reduced braking assist from a leaking booster
• Vacuum loss at the brake booster
• Inconsistent pedal response during braking
• Brake system performance issues tied to booster wear

Installation Notes and Tips

Verify the existing booster configuration before installation, including vacuum type, diaphragm style, and master cylinder stud thread size. Because the master cylinder is not included, inspect the master cylinder, pushrod interface, and mounting points before reassembly. For 1968-1976 Chevrolet Corvette brake booster replacement, confirm that the vehicle uses the same vacuum booster layout and mounting stud arrangement as the original unit.

Fits 1968-1976 Chevrolet Corvette, N/A. This part cross-references Monroe Shocks & Struts (e.g., 338906) for the same application.

Quality Assurance

MPA Electrical subjects these remanufactured brake boosters to 100% end-of-line testing using proprietary test equipment to verify vacuum seal integrity and pressure transfer performance before release.