I've done this mod as well. I figured if I didn't like it I could just leave the lid on. Many are critical of it, and I was before I did it. Everything I learned in fluid dynamics seemed the contradict the idea of it working. More warm air from the engine compartment should reduce efficiency.

However, since peforming the mod, I do have a little more power, a 1 mpg increase in gas mileage, and it sounds throatier (though that alone wouldn't have been enough to keep it).

The only thing I can figure is that the increased quantity of intake outweighs the fact that some of the intake is now warmer air.

BTW, just cut through the grooves on the inside as well. The deckplate still went in fine for me. The grooves actually helped hold in the screen.

well i got around to putting the cap back on today to see if it stopped the stumble i was experinceing and it did stop . i think ill try it with out the cap after i get my exhaust work done , and see if that could have been the problem. ill bet people that have done a fuel mod arent having this probelm , maybe even bigger injector and a computer to get everythiung jsut right . but i still do liek the way it sounds and the power increase i experinced ,but ill keep it capped and go back to stock for a while .

airrikk17

Are you guys remembering to pull a chip from your fuse box each time you cap/uncap? I thought I remembered that something had to be disconnected to let the engine reset to the new air flow situation.

yep every time i mess with the air box configuration ive been pulling the efi fuse .

airrikk17