These S&S USA made hydraulic cam chain tensioners provide superior valve train stability by using a thicker shoe for longer wear. Also provide direct chain oiling, larger hydraulic piston and tighter tolerances. Fits 2006 thru 2017 Dyna, 2007 thru 2017 Softail and 2007 thru 2016 Touring. Will also fit 1999 thru 2006 models with hydraulic cam plate upgrade.