1974 - 1982 Corvette Brake Pressure Differential Valve Rebuild Kit


A Muscle Car Research Exclusive!

Muscle Car Research is proud to offer a rebuild seal kit  for the GM 1257208 and 339780 brass combination brake valves made by Weatherhead. Our kit contains all of the internal parts needed to rebuild your leaky valve and return it to "like new" operating condition, including:

  • O-Rings
  • Weep hole rubber sealing disk
  • Weep hole rubber sealing disk retaining ring

The o-rings and sealing disk are molded from a 70 durometer ethylene propylene diene monomer (EPDM) rubber compound that is fully compatible with automobile brake fluid. The disk retaining ring is made of steel with a black oxide finish. All of the parts are proudly made right here in the USA!

Are you unsure if this kit is for you? According to my parts catalogs original applications include the following vehicles equipped with 4-wheel disc brakes:

  • 1974 - 1977 Chevrolet Corvette (valve part number 339780)
  • 1978 - 1982 Chevrolet Corvette (valve part number 1257208)

Interestingly, Ford used the same valve on 1974 F250 pickup trucks. This kit can also be used to rebuild the D4TA-2B328-A1A valve found on those trucks.

Complete rebuild instructions are available from the Muscle Car Research web site. Dealer inquiries are welcome - please contact us for pricing.