I got this from GrimmSpeed on gencoupe.com:
I know a few of your were looking for instructions on how to do this so here it is. The first step i've included(removing ram air) is not needed unless you want to premanently remove the ram air. Removing the ram air will get you even more turbo noise but you will be sucking in warmer engine bay air leading to lower performance. Taking the silencer(s) out will yield a bit more turbo/intake sound.
Remove ram air. As stated, you do not have to do this unless you want to keep it off.
Remove top portion of OEM airbox.
Remove breather lines.
Annoying up-side-down hose clamp. It is easier just to take off the hose clamps on the other end(previous picture) than to try and fuss around with getting the left clamp off. Of course its not to hard to get this off, just annoying so i bypassed it for the directions.
Loosen the 2 hose clamps that attach the 2 piece inlet hose to the intake silencer.
Intake silencer that we are taking out. Take it out.
You will need a 2 3/4" ID pipe that is about 2 1/2" long. Try to get a pipe as close to 3" OD as possible.
Insert new pipe into 2nd piece of turbo inlet hose.
While we are in here, might as well take the 2nd 'mini-silencer' out. It forgot to get a pic of what it looks like after you flip the mini-silencer over and stuff it back in.
I have a vid coming here shortly of the engine rev'ing...you can definitely hear the induction sound more prominently than before. I'm guessing you'll pick up a little power as well since you do not have this smaller ID restrictor pipe messing up with flow.
I hope this helps!
I would like to say thanks to Justin (GrimmSpeed) & gencoupe.com