Reaper 518 cam is a direct bolt in replacement for EVO engines, can be used with stock valve springs, pushrods and lifters. Will respond well with performance exhaust and air cleaner. This cam will also respond well with increased compression and cylinder head work. RPM range 1,650 - 5,500 Grind: 518 Intake: .518 Valve Lift, 4° Open, 42° Close, 226° Duration @ .053", .099 lift @ TDC, .109 Lobe Centerline Exhaust : .528 Valve Lift, 51 Open, 5 Close, 236 Duration @ 53"", .112 lift @ TDC, 113 Lobe Centerline