Fits 2006 Harley Davidson FLHX Street Glide VT Piston Kit, br> Recalibration required Crankcase boring required K Kit includes: Forged pistons, rings, circlips, chrome piston pins VT Kit includes: Contents of K Kit, plus gaskets Skirt coated 99-06 HD Twin Cam 88 97 10000XV (AP) Recalibration required Crankcase boring required K Kit includes: Forged pistons, rings, circlips, chrome piston pins VT Kit includes: Contents of K Kit, plus gaskets Skirt coated.