Originally Posted by Huck

welcome and congratulations on the new ride!

To answer your questions, the Stillen Gen3's are the highest hp gaining CAI's that I know of at a dyno-proven 17.5 hp gain. Brand new you are looking at spending right over $500 new if you shop around some. You can get them used all the time here from other forum members for anywhere from $300 to $425 depending on the condition of them.

Post MAF's and drop-in's will run you (I think) $250-$275 brand new. As far as I know there have been no dyno's posted by members here, so the gains are estimated, not definite. Judging from an educated guess, you're going to get between 6-10 hp from them. Again, this is just an estimate, and other's are welcome to chime in on this.

I personally have the Gen3's and I love them. It was my first bolt on mod, and I could definitely tell a difference in the acceleration and the sound. In my opinion, it is a wiser decision to just wait for some Gen3's to pop up on the forum and spend an extra $50 or so dollars to get them. Plus the shiny tubes look awesome lol. Hope this helps.