Turn pedal effort into hydraulic pressure for the brakes with the Dorman First Stop Brake Master Cylinder M3081. It is listed as a direct-fit replacement for many models, Hudson and Packard, among them the 1951-1957 Hudson Hornet, the 1956 Hudson Hornet Special and the 1955-1956 Hudson Rambler. See the "Vehicles it fits" section for the full list. This new cast iron unit is engineered to match the original master cylinder's design, function and performance.
It is made entirely from new, high-quality materials for a safe, durable replacement when the original master cylinder has failed.
- Precise replacement: the cast iron cylinder housing is built to match the casting material of the original part, for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely of new materials for quality and safety.
- Strict specifications: made to meet rigorous SAE International standards.
Specifications: 1 in bore diameter and one rearward outlet sized 1/2-20. The package contains one master cylinder, and the reservoir is included. Mounting hardware and a sensor are not included. Country of origin: Taiwan.
Interchange: 100-2910 · 13-32796 · 13-33081 · 10-33081 · 10-57588
M900012 · 300130 · 306215 · 3200306 · MC509480 · 5472937 · MC3081 · 426185 · 443761 · 443962 · F3081 · 1002910 · 1332796 · 1333081 · 1033081 · 1057588
This part cross-references / interchanges with the following part numbers:
M900012, 100-2910, 13-32796, 13-33081, 10-33081, 10-57588, 300130, 306215, 3200306, MC509480, 5472937, MC3081, 426185, 443761, 443962, F3081
Frequently Asked Questions
What does a brake master cylinder do?
It converts force from the brake pedal into hydraulic pressure that sends brake fluid through the lines to the wheel brakes. M3081 is a new cast iron unit with a 1 in bore.
Is this the right 1951-1957 Hudson Hornet master cylinder?
M3081 is listed as a direct-fit replacement for the 1951-1957 Hudson Hornet and the 1956 Hudson Hornet Special, with one used per vehicle. The "Vehicles it fits" section shows every listed application.
What comes in the box?
The box holds one brake master cylinder, and the reservoir is included. Mounting hardware and a sensor are not included.
What should I know before installing it?
Mounting hardware is not included. Check the vehicle service information for the correct fasteners, whether the originals may be reused, and the procedure for bleeding the brake system.
What are signs a master cylinder may need replacing?
A soft or sinking brake pedal, or brake fluid leaking at the master cylinder, can be signs. These symptoms can have other causes, so diagnose the brake system before replacing parts.
