Stops sealing problems of the 4 Speed transmission output shaft, at a very affordable price. It helps avoid transmission oil leakage. SUPER DOOPER CLUTCH SPRING RETAINER FOR 5 FINGER CLUTCH HUB, IF YOU RUN A OPEN BELT DRIVE AND YOU HAVE A UGLY STOCK HARLEY  RETAINER MADE OF STEEL, THIS IS THE GOOD LOOKER TO FIT INSTEAD. FOR 5 FINGER  CLUTCH HUBS FITTED TO ALL 4 SPEEDS BIG TWIN    Fits all 1936 TO 1986   4 SPEEDS       Note;   you must use nylock 5/16 unf nuts with this part,if you have extra thick clutch plates you may need to make nuts thinner to get perfect adjustment, call jeff for more info if need be.