When discussing the injen intake, remember there are two models. There is an open air element one that is quite inexpensive, which is a crapshoot whether you will have IAT problems or not. There is a injen EVOLUTION model, which is a full enclosed box unit, with a duct system, which is about 300ish.
All of these pretty much produce the same power. (about 6-7 hp, unless IAT's become an issue, then -15)
All of these pretty much produce the same power. (about 6-7 hp, unless IAT's become an issue, then -15)