Dorman - First Stop Brake Master Cylinder P/N:M39451

Convert brake-pedal force into the hydraulic pressure that operates the braking system with the Dorman - First Stop Brake Master Cylinder (M39451). It is precision-built to match the design, function, and performance of the original master cylinder, dropping in on the listed applications — including the 1983-1984 Chrysler E Class, 1983-1989 Chrysler LeBaron, 1983-1989 Dodge Aries, 1983-1990 Dodge Omni and 1983-1989 Plymouth Reliant. It fits 25 applications in total (all engines); see the Buyer's Guide tab for the full list.

Its two outlets feed the vehicle's dual brake circuits, and the aluminum housing is cast to match the original part's casting material for similar performance.

• 100% new: built entirely from new materials, not remanufactured.
• Aluminum housing: cast to match the original part's casting material.
• EPDM rubber components: made of a high-quality EPDM compound for resistance to glycol-based brake fluid.
• SAE-compliant: made to meet rigorous SAE International standards.

The cylinder has a 21 mm bore diameter and a 3/8-24 in secondary (rearward) outlet thread. A reservoir is included; no sensor or mounting hardware is supplied, so consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China. Manufacturer part number M39451.