Race seriesRPM range 3100-6650Aggressive camshaft requiring high lift and higher load valve springs, performance pushrods and lifters.Requires large bore size, ported cylinder heads, ported intake manifold, high flow valves and large throttle body.High flow air cleaner and triple stepped exhaust pipe highly recommended.Feuling recommends matching this cam with Race Series oiling system.Clearances must be checked when installing.Feuling does not recommend tuning beyond stock emissions standards.