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), D0AZ-2B257-C (marked D0AA-2B328-C), D4FZ-2B257-A (marked D4ZA-2B328-AA), and D5ZZ-2B257-A (marked D5ZA-2B328-BA or D5ZA-2B328-BB) Ford disk brake combination pressure differential and rear brake pressure control valve made by Kelsey-Hayes and Wagner. Our kit contains all of the parts needed to rebuild your leaky valve and return it to "like new" operating condition, including:
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? These valves were originally used on the following Ford and Lincoln/Mercury vehicles equipped with front disk brakes:
Complete rebuild instructions are available from the Muscle Car Research web site. Dealer inquiries are welcome - please contact us for pricing. Be sure to check out our Pressure Differential Switch Lock Tool that you can use to keep the piston centered when bleeding your brakes after rebuilding your valve!