MPA Electrical NM4004 Brake Master Cylinder

Brake Master Cylinder for 1985 Corvette

Restore consistent brake pedal response with this new brake master cylinder from MPA Electrical. Built for the 1985 Chevrolet Corvette with front disc brakes, part number NM4004 is a standard replacement unit with an aluminum body, integrated reservoir, and a 0.875-inch bore for direct hydraulic performance.

Key Features

• Fits 1985 Chevrolet Corvette, front disc brakes
• MPA Electrical NM4004 brake master cylinder
• Standard replacement grade for brake hydraulic service
• Aluminum master cylinder construction
• 0.875-inch bore diameter
• Reservoir included; master cylinder cap included
• Uses DOT 3 brake fluid
• Two mounting holes with 0.350-inch mounting hole diameter
• New condition

Product Details

The MPA Electrical NM4004 is a brake master cylinder engineered for brake system restoration on the 1985 Chevrolet Corvette. It is built as a standard replacement part with an aluminum housing and reservoir included, making it a practical choice for servicing hydraulic brake performance on vehicles equipped with front disc brakes. The 0.875-inch bore diameter supports the hydraulic characteristics expected for this application, while the included cap helps complete the assembly. This part cross-references 14080223 for the same application.

MPA Electrical brake master cylinders are developed from OE sample data and verified against OE specifications using controlled testing processes. That approach helps ensure the cylinder is ready for brake system service and consistent hydraulic operation after installation. If you are searching for a 1985 Chevrolet Corvette brake master cylinder, Corvette master cylinder replacement, or NM4004 brake hydraulics service part, this unit matches the listed application.

What It Helps Address

• Low or inconsistent brake pedal feel
• Internal master cylinder wear affecting hydraulic pressure
• Brake fluid leakage at the master cylinder assembly
• Reduced braking response in a front disc brake system
• Need for a direct replacement during brake hydraulic repair

Installation Notes and Tips

Before installation, verify the vehicle’s brake configuration and confirm the 1985 Chevrolet Corvette front disc brake application. Transfer or source any required mounting hardware separately, since mounting hardware is not included. The push rod, brake booster, seals, and brake pressure switch are also not included. Bench bleed the master cylinder before connecting brake lines, then fill with DOT 3 brake fluid and bleed the brake system thoroughly after installation.

Quality Assurance

MPA Electrical tests each master cylinder against OE specifications using proprietary procedures and strict protocols to support consistent braking performance out of the box. The NM4004 is a new, standard replacement brake master cylinder built for dependable hydraulic service on the 1985 Chevrolet Corvette.