AFE intakes suck in general. I bought mine and used it for a little just because it sounds great, but it just takes the responsiveness of the car and it feels like it just absorbs wayyy tooo much air. I had it off for a couple of months and car drives much better without it. On a 335i it might make a difference cause the turbos, but on our 328i, it just looses power. DONT BUY ONE, YOU WILL REGRET IT. I can sell you mine if you really want to waste money.
Oh and customer service is terrible. Hope this helps those who are looking for intakes.