I know this has probably been talked about before, but my brother just got a 95 M3 and he wants to put an intake on it. I want to buy it for him for his b-day. Which one should I get him? Autothority, Turner, or Dinan cone intake? I was thinking about getting him the Autothority with carbon fiber, it's a little expensive just because it has cf on it but I know how he likes that stuff. Are the filters the same? Do they all work about the same? Any input appreciated and sorry about the long post.