Features of the Heavy Duty Fork Spring Kit / 49mm Heavy-duty version of the Progressive Suspension fork springs The cost-effective go-to for a substantial increase in front end ride quality Include Progressive Suspension rate springs combined with preload spacers Can improve front end stability and brake dive control as well as increase comfort for heavier riders or those looking for a firm high-performance feel out of their forks Fitment For 49mm front forks 2016-2017 Harley-Davidson Low Rider S FXDLS 2013-2017 Harley-Davidson Breakout FXSB 2008-2017 Harley-Davidson Fat Bob FXDF 2008-2011 Harley-Davidson Softail Rocker C FXCWC 2008-2010 Harley-Davidson Softail Rocker FXCW 2007-2011 Harley-Davidson Night Rod Special VRSCDX 2007-2010 Harley-Davidson V-Rod VRSCAW 2007-2009, 2014-2017 Harley-Davidson Low Rider EFI FXDL 2007 Harley-Davidson V-Rod Screamin' Eagle Tribute VRSCX 2006-2017 Harley-Davidson Street Bob FXDB 2006-2014 Harley-Davidson Super Glide Custom EFI FXDCI 2006-2008, 2010-2017 Harley-Davidson Wide Glide EFI FXDWGI 2006-2008 Harley-Davidson Night Rod VRSCD 2006 Harley-Davidson Super Glide FXD35 2006 Harley-Davidson Wide Glide FXDWG 2006 Harley-Davidson Super Glide FXD 2006 Harley-Davidson Low Rider FXDL 2005 Harley-Davidson V-Rod VRSCB 2004, 2006-2010 Harley-Davidson Super Glide EFI FXDI 2002-2006 Harley-Davidson V-Rod VRSCA