Engineered to allow your shock to work effectively - This spring is a necessity for heavier riders or when carrying passengers - Improves damping control while eliminating bounce - Provides better control in corners and rough roads - Great with or without lowering kits - Sold individually - Made in the U.S.A.Fitment1999-2013 Yamaha Road Star XV1600A1999-2013 Yamaha Road Star XV1700A2002-2009 Yamaha Road Star XV1700PC Warrior1999-2013 Yamaha V-Star 650 Classic XVS650A1999-2013 Yamaha V-Star 650 Custom XVS650