RWA 1407R #3 2.3 Hydraulic roller camshaft. .510″ lift 250 duration @.050″. This camshaft works best with modified engines that have increased induction ie. larger fuel injectors or larger carburetors. This cam really comes to life when using our cheater valves RWA 1492 and RWA 1494. The RWA 1470 valve spring set and RWA 1476 A steel retainers set must be used for optimum performance.