I did this stock airbox mods yrs ago...see my photo gallery for pics.

 

All this chatter about air boxes and filters. Cut to the chase and get down to the science. What is the silicone count on on a used oil sample? On mine the stock filter and box was 2 ppm for three years. For the last three years my AFE stage II PG7 intake, results are still 2ppm silicone. I submit a used oil sample with about 10k every spring. I change my AFE PG7 filter every six months and clean the pre-filter every month. So documented results of no change! I am not dusting my engine with this setup. But the big question is how do you service a stock or aftermarket filter. Do run a pre-filter? How do you clean and oil it or is it a dry filter. Now what of the benefits? Turbo noise, better filtration, increased air flow, decreased or increased IAT temps. With a 2nd or 3rd gen you better pay close attention to intake temperature for for maximum fueling efficiency. Cooler air does allow for more fuel which we all want. But for a stock or mild bombed truck there is no benefit to airbox mods.