For models using HD Hyd System
Notes: Fits 1998-17 Big Twin, Twin Cam models. Converts stock diaphragm spring to six coil springs. Provides a more progressive, controllable engagement. Billet pressure plate and springs included- replaces stock pressure plate/spring. Three different spring pressure options make it ideal for stock to heavy duty applications. Fits models using HD hydraulic system.
Note: Does not fit 2013-17 narrow primary models.
Fits these Bikes: 1998-2006 Harley Davidson Big Twin 2007-2010 Harley Davidson Big Twin 2011-2016 Harley Davidson Big Twin 2017 Harley Davidson Big Twin