Hydraulic Flat Tappet. Torque monster for 400-455 c.i. daily driv- en street performance vehicle. Excellent torque and HP production with heavier emphasis on the low to mid range. Will work in ski boat applications with larger 455 c.i. engines. Choppy idle.; Advertised Duration (Int/Exh): 262/268; Duration @ .050 (Int/Exh): 219/227; Gross Valve Lift (Int/Exh): .499/.510; LSA/ICL: 112/108; Valve Lash (Int/Exh): Hyd/Hyd; RPM Range: 1300-5500. Cam & Lifters NOS in the box. Went w/a custom ground Clay Smith grind. Shipping will be actual cost by FED-X or UPS. Lower 48 states only.