Centric 130.61031 Brake Master Cylinder

Centric Premium Brake Master Cylinder

The Centric Premium Brake Master Cylinder, part number 130.61031, is an OE-style hydraulic replacement built to match original equipment fitment, configuration, and performance requirements. It is a direct-fit brake master cylinder for select Ford and Mercury applications, including 1978-1982 Ford Mustang and related platform vehicles.

Centric’s Premium Brake Master Cylinders are part of a complete brake hydraulics program that covers master cylinders, wheel cylinders, brake hoses, repair kits, and remanufactured power boosters. This unit uses a cast iron master cylinder body with an integral single reservoir, a 7/8 in. bore, and inverted flare outlet ports for a factory-style hydraulic connection.

Key Features

• OE-style brake master cylinder for select Ford and Mercury vehicles
• Part number 130.61031
• Cast iron master cylinder material and cast iron reservoir material
• Integral single reservoir with cap included
• 7/8 in. bore diameter (22.225 mm)
• 2-port design with 1/2 in.-20 primary outlet and 7/16 in.-24 secondary outlet
• Inverted flare outlet threads for factory-style brake line connection
• 2 mounting holes
• Mounting hardware, push rod, brake booster, and bleeder hoses not included

Product Details

Centric Premium Brake Master Cylinders are engineered to match original equipment parts in quality, configuration, and fitment. The 130.61031 master cylinder features a straight bore design, integral reservoir style, and a cast iron construction that supports consistent hydraulic operation in classic brake systems. This part number 130.61031 is listed for applications such as 1982 Ford Mustang, 1981 Ford Mustang, 1980 Ford Thunderbird, and 1978-1981 Mercury Zephyr, along with additional Ford and Mercury models in the same fitment group.

This part cross-references Dorman - First Stop M99084 and Raybestos Brakes MC39037 for the same application.

Common Brake Issues This Part May Address

• Low or inconsistent brake pedal pressure
• Internal master cylinder leakage
• Brake fluid loss at the master cylinder body or outlet ports
• Spongy pedal feel caused by hydraulic seal wear
• Brake warning concerns related to master cylinder failure

Installation Notes and Tips

• Verify bore size, outlet thread sizes, and reservoir style before installation.
• Bench bleed the master cylinder before connecting brake lines.
• Inspect brake lines, fittings, and the booster push rod length during replacement.
• Confirm the vehicle’s brake system configuration matches the listed fitment notes, including 9 in. rear drum and production-date restrictions where shown.
• Use clean brake fluid and follow the vehicle service manual for bleeding procedures.

Quality Assurance

Centric’s brake hydraulic program is built around OE-style replacement parts with application-specific fitment and factory-like configuration. The 130.61031 master cylinder is manufactured to align with original equipment dimensions and port layout for the listed Ford Mustang, Ford Thunderbird, Mercury Capri, Mercury Cougar, Mercury Fairmont, and Mercury Zephyr applications.