Dorman M76160 Brake Master Cylinder

Brake Master Cylinder Overview

This Dorman brake master cylinder is built for specific 1971-1972 full-size GM applications with Bendix brakes and power brakes. It matches the original design and function for direct hydraulic replacement, with a cast iron body and integrated reservoir.

Key Features

• 1.125-inch bore diameter for the specified brake system application
• Cast iron construction for durable hydraulic service
• Reservoir included for a complete master cylinder assembly
• Two outlet ports with rearward outlet size of 9/16-18
• New materials used in the replacement design

Detailed Description

Use this brake master cylinder when replacing the hydraulic unit on compatible Buick, Chevrolet, Oldsmobile, and Pontiac models from 1971-1972. The Dorman M76160 is engineered to match the original master cylinder’s design, function, and performance, making it a direct-fit solution for vehicles equipped with Bendix brakes and power brakes. The 1.125-inch bore and dual-outlet layout support the original brake system configuration, while the cast iron housing provides a familiar OE-style construction. Part number M76160 is also referenced by several aftermarket cross numbers for the same application.

Common Replacement Issues

• Brake pedal travel caused by internal master cylinder wear
• Hydraulic fluid leakage from a failing cylinder body or seals
• Reduced braking response from loss of hydraulic pressure
• Brake system performance issues after corrosion or contamination

Installation Notes

Verify Bendix brake equipment, power brake setup, bore size, and outlet thread specifications before installation. This application uses a reservoir and two outlet connections, so line routing and port identification should be confirmed during replacement. Mounting hardware is not included.

Quality Assurance

Dorman manufactures this master cylinder as a new replacement part using high-quality materials for durable service. Part number M76160 cross-references Four Seasons 76160 and Raybestos Brakes MC36361 for the same application.