Dorman - First Stop Brake Master Cylinder P/N:M390336

Convert brake-pedal force into the hydraulic pressure that operates your vehicle's brakes with the Dorman - First Stop Brake Master Cylinder (M390336). It drops in as a direct-fit replacement for the 1997-1999 Ford Expedition, 1999-2003 Ford F-150, 2004 Ford F-150 Heritage, 1996-1999 Ford F-250, 1997 Ford F-250 HD, 1996-1997 Ford F-350, 2001-2004 Ford Lobo, and 1998-1999 Lincoln Navigator (all engines). It is engineered to match the design, function, and performance of the original master cylinder on these applications.

• Aluminum housing: constructed to match the casting material of the original part, with a 1.25 in bore, two outlets, and a 7/16-24 rearward outlet size.
• Reservoir and sensor included: ships with the fluid reservoir and fluid-level sensor.
• 100% new EPDM seals: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid; built entirely from new materials, not remanufactured.
• SAE-spec build: made to meet rigorous SAE International standards.

Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. If a sinking or spongy brake pedal, internal fluid bypass, or external leakage traces back to a failed master cylinder, this unit replaces it. Country of origin: China. Manufacturer part number M390336.