Feuling HP+ Oil System With Hydraulic Conversion For Harley Twin Cam Features: Kit includes a billet 6061 aluminum high volume oil pump, billet 7075 aluminum high flow cam support plate, HP+ Hydraulic Roller lifters, gaskets and O-ring kit This kit increases oil pressure, oil volume, engine oil flow and return oil scavenging, eliminating wet sumping and oily air cleaners The Feuling System generates cooler oil and engine temperatures resulting in a quieter more powerful engine Note : Conversion camplate uses 1999-2006 chain drive camshafts with late style 2007-13 hydraulic chain tensioner system, purchased separately