Originally Posted by K9ExDet
Is CAI better than replacing your OE filter with a KandN filter? I ask because im wondering how much engine heat the OE setup blockes compared to an aftermarket CAI?
The honest answer is they are not much better. On a dyno they may show some slight gains, but almost never enough to actually be felt by you. Most of the time they are louder and you get a placebo affect cause it sounds "meaner". As for fuel, if you pick up an honest .5-1mpg I would be impressed and happy.
Now, that said, there are some creative designs out there that might be breaking that mold these days. To truly take advantage of that though you will also need a tuner of some sort.