1967 - 1969 Ford Disc Brake Pressure Differential Valve Kit


Muscle Car Research is proud to offer a rebuild kit for the C7ZZ-2B257-D, C8AZ-2B257-A, C8OZ-2B257-B, C8SZ-2B257-A, C8VA-2B257-E, C8ZZ-2B257-A, and C9AZ-2B257-A Ford disc brake pressure differential valves made by Wagner and Weatherhead.  Our kit contains all of the parts needed to rebuild your leaky valve and return it to "like new" operating condition, including:

  • O-ring
  • X-rings
  • Copper crush washer

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.  All parts are made right here in the USA!

Are you unsure if this kit is for you?  The C7ZZ-2B257-D, C8AZ-2B257-A, C8OZ-2B257-B, C8SZ-2B257-A, C8VA-2B257-E, C8ZZ-2B257-A, and C9AZ-2B257-A pressure differential valves were originally used on the following Ford and Lincoln/Mercury vehicles equipped with front disc brakes:

  • 1967 Ford Mustang
  • 1967 Mercury Cougar
  • 1968, 1969 Ford Galaxie and LTD
  • 1968 Mercury Meteor and full-sized Mercury
  • 1968, 1969 Ford Mustang
  • 1968, 1969 Mercury Cougar
  • 1968, 1969 Ford Fairlane, Torino
  • 1968, 1969 Ford Thunderbird
  • 1968, 1969 Mercury Comet, Montego, Cyclone
  • 1968, 1969, 1970 Ford Falcon
  • 1969 Lincoln Continental

Complete rebuild instructions and additional identification information can be found on 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!