Originally posted by INTEGRAtoWRX
I think you get a slight improvement in airflow (although it may be a little warmer air since it's in the engine compartment) So the silencer is a bit more restrictive, and it is there to silence the turbo sound. It's a big plastic weird looking thing in the fenderwell.
Not going to notice much of a power difference, but I did it strictly to hear the turbo and bov. I love the sound of the turbo spooling and the bov, and just didn't want to spend money on an aftermarket bov etc. Noone seemed to notice a difference when I took it off (cops, people walking by etc..) It's just super easy to take off, it's free, and you can put it back on quickly if you want to when you take it to the dealer.
Did it affect your gas mileage?