well i have it installed in my car, was lucky to let them install it for me, got an upgrade just for that
mine was the first carbon fiber CAI for the mp3, and believe me, its all sweetness, they also gave me some stickers! they will post my ride pics later this week or next week with the carbon fiber CAI, looks wonderful!
Now for performance:
It improves the hell out of this car, trust me on this one, i could never be happier, and for those that say that this job looks cheap, go get a life or get that injen that blows your sensors away. I just put 125 to the mp3 and it was wonderful, i would say about 12-14 more hp for real, now, i could always just dyno the stuff, but as i say before, im a car iliterate, thats why i didnt even try to install that, but i got some bonus out of it!
Now, it does give a good IMPROVE to the car sound, way more agressive exhaust tone, little whistle in the engine compartment, its all good.
I truly recommend this CAI, but if u guys dont trust it, well, just go ahead and pay more for the same stuff.