Originally Posted by
onehundred80
There must be an explanation though, is it because the air is insufficient without the air box and intakes? I thought everyone was changing the whole set up.
I think that the changes are quite subtle anyway, it took the tune to see a real difference and that definitely took a couple days of driving to feel the full benefit.
Being an automatic.. mine seemed to have some very minor surge issues at first (extra second or so @1500 rpm when coasting to a stop). The only other intake mod from OEM was the K&N filters. And the performance difference was good for a little extra giggle or two when accelerating from a stop.. Did it by "the book" here, probably took twice as long as most.. I was in no hurry and 100% right the first time was the goal.