Dorman - First Stop Brake Master Cylinder P/N:M40000

Give your brake pedal a fresh source of hydraulic pressure with the Dorman First Stop Brake Master Cylinder M40000. This new unit converts pedal effort into the fluid pressure the brake system relies on. It fits many vehicles, among them the 1962-1966 Chevrolet Impala, 1963-1966 Chevrolet Suburban and 1962-1966 Chevrolet Bel Air. See the Buyer's Guide tab for the full list. Dorman precision-engineered it to mirror the design, function and performance of the original master cylinder on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.

• Precise replacement: The cast-iron cylinder housing is constructed to match the casting material of the original part and is intended to deliver similar performance.
• Durable design: Every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
• 100% new: It is made entirely from new materials for quality and safety.
• Strict specifications: It is made to meet rigorous SAE International standards.

Specifications: The cylinder has a 1 in. bore diameter and one rearward outlet sized 7/16-24, and the reservoir is included. Mounting hardware and a sensor are not included. The listed applications use one master cylinder. Country of origin: Taiwan.

Signs that a master cylinder may need replacing include a soft or sinking brake pedal, fluid leaking at the cylinder, or a falling reservoir level. Diagnose the cause before replacing the part. After installation, bleed the brake system as directed by the vehicle service information.