Advertised Duration - 246/240 Duration @ .50 Lift - 192/186 Lift .386/.382 Crower performance cams are ground from brand new billet cores. They are not regrinds or adapted designs, they are brand new cores with specially designed profiles for the Dodge SRT-4 turbocharged engine! These high performance cam cores start life as solid billet stalks which allows Crower unlimited specifications all in the name of performance. These cams maintain a factory 1.180" base circle for decent idle characteristics as well. Crower tested operating ranges - 1200-7000+rpm Slight lope at idle. Crower has tested these cams with both the stock forced induction as well as adding more boost and nitrous with great results. Crower 64472