I've heard good things about the e-fans, but it seems like something that could screw up when say your driving through a creek, or small river. As apposed to say.... a mechanical fan. I suppose one could rig a circuit that I can disable it from inside the truck.

I tossed a K&N air filter, it's supposed to have nearly 3 times the airflow over the stock filters according to the box (I'm not so gullible to believe it's exact), but it really feels like it. Nothing scientific just how the truck performs when I put the throttle down.

With the addition of the cowl induction my EGT's are much lower, even when doing stupid things.... Like flooring it up steep hills...