Harley Race clutch hub High Performance fits Big Twins 2007-17 rep.37978-08

Description

High Performance (Race clutch hub only) features:
upgrade six studs external thread adjustable pressure hub (37978-08)
needs 6 individual coil springs produce evenly pressure on top pressure plate
needs 6 Nylon lock hex nut allow adjustable pressure from highest torque (Race spec) to standard till 0, (2.5 time more torque vs standard diaphragm spring). Which perform 570 to 0 pound force on clutch.(turn all 6 lock nut in till completely compressed coil springs, back turn evenly on each lock nut to decrease pressure till desired spec or 9.5 turns to be stock pressure)
needs CNC machined Billet T6 Aluminum top pressure plate, which delivers maximum clutch release prevent uneven pressure warp (most common issue on diaphragm spring)
This hub accept OEM clutch plate kit (1998-2017) or High performance clutch plate kit. (sold separately)
Disclaim / Warning:
Rider and passenger safety depend upon the correct installation of this hub. Use the appropriate service manual procedures. If the procedure is not within your capabilities or you do not have the correct tools, have a Harley-Davidson qualified Mechanics perform the installation. Improper installation of this kit could result in death or serious injury.