Replacement pinion shaft precision ground for correct fitment.
Harley OE Part num: 24005-57
Fits: 1957-76 Ironhead Sportster
Harley OE Part num: 24008-75
Fits: 1977-80 Ironhead Sportster
Harley OE Part num: 24005-80
Fits: 1981-85 Ironhead Sportster