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Late Model, Sportsmen, IMCA - 1/4 mile-3/8 mile. All Howards Cams use the highest-grade race quality billets available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards Cams are manufactured on dedicated high precision cam grinding machines. Cam Style: Hydraulic Flat Tappet Basic RPM Range: 3000-7000; Intake Duration @ .050": 256; Exhaust Duration @ .050": 264; Advertised Intake Duration (@ .006"): 291; Advertised Exhaust Duration (@ .006"): 299; Intake Valve Lift with OE Rocker Ratio (1.50): .535" Exhaust Valve Lift with OE Rocker Ratio (1.50): .555"
Stock (O.E.) valve springs cannot be used.