Even tho I have a AFE PRO GUARD 7 on my truck some of the performance shops(Banks also)claim that on stock and somewhat modded trucks that a drop in filter does a fine job and the power increase between a drop in(in the stock air box)and a aftermarket set up there is viturally no differance on a dyno. I think if I was doing it again I'd use a PRO GUARD 7 drop in and not spend the $250 plus for a new intake setup. I of course kept my old air box setup and may put it back on again in the future.