Like Kllr3v said anything that doesn't require a tune really isn't worth it and Ive seen some 05-09 GT's that don't even respond well to CAI's that don't require a tune. I have the Airaid Race CAI on mine along with the Diablo Trinity T-1000 tuner its a little pricey to buy that tuner just for a CAI but I have quite a few mods were its helped a lot. You can get a nice package deal usually were they will sell a CAI along w/ a tuner for a reasonable price
The reason these cars need a tune for a cai is because they have larger maf housings. The "no tune" cai's have stock-diameter maf housings, so they're not worth having.