Sifton 5 Finger Diaphragm Clutch Spring Conversion for Harley 4-Speed Models

FITS: 1941-1964 Big Twins with Open Primary, 1965-1984 Big Twins with Open or Closed Primary

Diaphragm clutch spring pressure plate includes 5-stud clutch, diaphragm spring, pressure plate, rollers, adjustment screw, and stud nuts. 

Updates old style coil spring clutch to new style diaphragm clutch for positive clutch engagement.