See more: Rear Brake Master Cylinder
Rebuild kits In 1998 GMA changed the material from the piston assembly into aluminum. These master cylinders are identified by a letter "P" on the inside of the lid., Late style 5/8" bore rebuild kit for "P"-marked master cylinders, GMA
These GMA American-crafted master-cylinders are CNC machined from-aircraft-quality billet aluminum and-utilize OEM style top cover gaskets and 5/8" diameter internal components. Fits late 1979 thru 1983 FX models with mid-shift and can also be installed-in many custom applications. These master cylinders are available with either Wagner or Kelsey-Hayes style mounting holes, both are highly polished.
Note: Early and late style rebuild kits can NOT be interchanged!