Stillen and Injen are the way to go.
I went with the black Injen CAI.
Injen intake are fairly easy to install. The instruction has really good clear pictures. For this setup, you need to change the stock windshield water reservoir with the one Injen provided. Because the stock one won't fit with the intake.
I heard for the Stillen one if you dont install it correctly, the intake can damage the ac hose. And you will also need to do some cutting on your car.
The car does sound a little louder from the front. And if you listen closely to the intake you can hear the whooshing. As for the Hp increase, I cant really tell from driving. It feels about the same with the stock intake.
