Howdy Explorer Gurus!
I recently got an '03 explorer for a company truck. It's the strip-down model, but still has control trac and a few other goodies. I was wondering if there are any tricks to get a little more zip out of the 4.0L. It's the engine that is Ethanol-ready if that makes a difference. I tried searching 'free power mod*' but didn't yield any results.

Improving the intake and exhaust are always good mods,

Dwitching to synthetic fluids is also a good move.

Drill holes in your Air Box. It will look ghetto but, hey, its free. :D