AEM. I think the biggest problem was that it was just a crappy design. But definitely staying away from that idea, it really doesn't help. It was an expensive lesson for me. I now have a K&N filter and an turbo inlet pipe from 034 Motorsport.

 

That's good to know.

I had an EvoMS on my 2001 A4 and never had any problems with it. I mean it didn't improve performance or anything but it definitely didn't decrease performance.

How's the 034 Motorsports turbo inlet pipe? Notice any difference with it? I've been thinking about picking one of those up myself.