Dorman - First Stop Brake Master Cylinder P/N:M101266

Keep hydraulic pressure flowing to the brakes with the Dorman - First Stop Brake Master Cylinder, MPN M101266. A master cylinder converts brake-pedal force into the hydraulic pressure that operates the braking system; if a worn or leaking original is the cause of a sinking or spongy pedal, this unit replaces it. It's engineered to drop in like the original on the listed applications — a long list of 1971-1984 Chevrolet and GMC trucks and vans, including the Chevrolet C20 Pickup, C30, G30 and P30, plus the GMC C25, G3500 and P2500. See the Buyer's Guide tab for the full list.

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

It has two outlets, a 1.25 in bore diameter and a 1/2-20 rearward outlet size, and includes the reservoir. A sensor is not included, and mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China. Manufacturer part number M101266.