A Muscle Car Research Exclusive!

Muscle Car Research is proud to offer a rebuild kit for the D0OZ-2B257-C (marked D0OA-2B328-D or D2ZA-2B328-AA) Kelsey-Hayes brake pressure differential valve.  Our kit contains all of the parts needed to rebuild your leaky valve and return it to "like new" operating condition, including:

• O-rings
• X-ring
• Proportioning valve seals
• Proportioning valve spring
• Copper crush washer

The contents of the kit can be seen compared to the original parts (the new parts included in the kit are underneath the original parts) in the picture above.  All of the rubber parts are molded from a 70 durometer ethylene propylene diene monomer (EPDM) rubber compound that is fully compatible with automobile brake fluid.  The spring is made from type 302 stainless steel and features squared and ground ends.  All parts are made right here in the USA!

Are you unsure if this kit is for you?  The D0OZ-2B257-C valve was originally used on the following Ford and Lincoln/Mercury vehicles equipped with front disk brakes:

• 1970, 1971, 1972, 1973 Ford Mustang
• 1970, 1971, 1972, 1973 Mercury Cougar
• 1970, 1971 Ford Torino
• 1970, 1971 Ford Fairlane
• 1970, 1971 Mercury Comet
• 1970, 1971 Mercury Montego
• 1972 Ford Pinto station wagon

Complete rebuild instructions are available from the Muscle Car Research web site.