*Magnum Camshafts* * Great high RPM power * Easy on valve train parts * Can be used with mild ratio rocker arms and traditional performance valve springsAvailable * Best with aftermarket converter and 9.5:1+ compression PartNumber : cca12-309-4 Description : Magnum Muscle Camshaft Title : 12-309-4 CamShaft, CS 284S-10 Intake Duration : 284 RPM Range : 1000-7000 Exhaust Duration : 284 Exhaust Duration @ .050 in. : 246 Exhaust Valve Lift(in) : 0.489 Intake Duration @ .050 in. : 246 Lifter Type : Hydraulic Flat Tappet Intake Valve Lift(in) : 0.489 Usage : Street/Performance Engine Components::Camshafts