Dorman - First Stop Brake Master Cylinder P/N:M71285

Turn pedal force into the hydraulic pressure that operates the brake circuits with the Dorman First Stop Brake Master Cylinder M71285. It installs as a direct-fit replacement for a wide range of classic Chevrolet and GMC applications, including the 1967-1970 Chevrolet Bel Air, Biscayne, Caprice and Impala, the 1967-1969 Camaro, 1971-1972 Chevrolet Blazer and C10/K10 trucks, and the 1971-1973 GMC P15/P1500 Van (engine: All) — see the Buyer's Guide tab for the full list.

• Cast iron housing: constructed to match the casting material of the original part for similar performance.
• EPDM seals: rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
• 100% new: made entirely of new materials, not remanufactured, and made to meet rigorous SAE International standards.
• Specs: 1.125 in bore, two outlets with a 1/2-20 secondary outlet thread, and an included reservoir; no sensor is included.

Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused. Signs the original master cylinder may need replacing include a slowly sinking or spongy pedal and brake-fluid seepage at the cylinder. Country of origin: China. Manufacturer part number M71285.