Dorman - First Stop Brake Master Cylinder P/N:M39413

Turn brake-pedal force into the hydraulic pressure that operates the brake system with the Dorman - First Stop Brake Master Cylinder M39413. It drops in as a direct-fit replacement across a wide range of 1981-1991 Chevrolet and GMC C/K, R/V, Suburban, Blazer, K5 Blazer and Jimmy trucks, plus Jeep Cherokee, Wagoneer, Grand Wagoneer, J10 and J20 models — see the Buyer's Guide tab for the full list of covered vehicles.

This unit sends fluid through two outlets, with a rearward outlet sized 1/2-20, and ships with its reservoir included.

• 100% new: made entirely of new materials, not remanufactured.
• Durable design: rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
• Aluminum housing: constructed to match the casting material of the original part for similar performance.
• Strict specifications: made to meet rigorous SAE International standards.

Mounting hardware is not included, and no sensor is supplied. Consult the vehicle service information for the correct fasteners and whether they may be reused. If a worn or leaking master cylinder is the cause of a low or fading brake pedal, this unit replaces it.

Manufacturer part number: M39413.