Originally Posted by BimmerDude

I have an AFE CAI. It works great. At WOT it makes a great sound. Performance is much better at low and mid range. You will like it. Plus I'm getting better fuel mileage. I have a 4.4i was doing 15 in city and highway, now I'm doing 16.5 to 17 city and highway. Its worth it and it pays for itself after a while.