Dorman M631046 Brake Master Cylinder OE Replacement 1.125 in. Bore

The Dorman M631046 is a 100% new OE replacement brake master cylinder engineered for select Ford models. With a 1.125-inch bore diameter and full power brake compatibility, this unit is precision-built to restore proper braking function with a direct-fit installation.

Unlike remanufactured alternatives, this master cylinder is made entirely from new materials — including a cylinder housing cast to match the original part's material composition and rubber components formulated for long-term durability with glycol-based brake fluid.

Key Features:

• 1.125 in. bore size for accurate hydraulic pressure output
• Power brake compatible for boosted brake system applications
• 100% new construction — not remanufactured — for maximum reliability and safety
• Cylinder housing matches the casting material of the original OEM part for consistent performance
• All rubber seals and components use high-quality EPDM compound for resistance to glycol-based brake fluid
• Manufactured to meet SAE International standards for hydraulic brake components
• Direct OEM replacement design — no modifications required for installation

The Dorman M631046 brake master cylinder delivers a reliable, cost-effective repair solution that meets the same engineering standards as the factory part it replaces.