BRAND NEW Part Number: 330-0544 Upgrade to S&S performance chain drive camshafts Replace stock oil pump, cam support plate, cams, and tappets with all new premium U.S. made S&S components Improved engine performance C higher lift and optimized cam timing Better, more consistent oil pressure Type: 551CE; Timing Open: 17 /41 ; Timing Closed: 19 /17 ; Duration at 0.053: 216 /238 ; Lift at TDC: .178″/.170″; Valve Lift: .550″/.550″