REBUILD KIT, Brake Pressure Differential Valve, (3), for valves marked ID# *C8ZA-2B257-F1, F2, H1, H2, K, K1, K2, or M*, Instruction sheet can be downloaded from our website
Manufacturer Reference #'s: 2B257-KIT-4,
Product Instructions and Additional Info:2b257-5ak_instruction
Went on fine- o rings look a bit smaller than original however seem to work fine.
Submited on May 24, 2020 by frank S.
YES I would recommend this product.