Factory# 44151-77 and 44153-77.

Brake Caliper Rebuild Kits.

1977-1978 fits H-D FX Super Glide
1980-1982 fits H-D FXB Sturgis
1983 fits H-D FXDG Disc Glide
1977-1983 fits H-D FXE Super Glide
1979-1981 fits H-D FXEF Fat Bob
1982-1983 fits H-D FXR Super Glide II
1982-1983 fits H-D FXRS Low Glide
1983 fits H-D FXRT Sport Glide
1977-1982 fits H-D FXS Low Rider
1983 fits H-D FXSB Low Rider - Belt
1980-1983 fits H-D FXWG Wide Glide