Is this exhaust worth puting on my STI? I am planning on putting a large front mount and a huge turbo on the car. Does anyone have this exhaust. I am worried about it hurting my performance before I have upgraded to the bigger turbo. Is there any truth to this? Thanks guys.

Generally w/ a turbo the best exhaust is no exhaust. Turbo's hate backpressure. So larger is usually better. I'm planning on going w/ the APS 3.5" tbe and dp on my STi.....if and when I get it.
Good luck.
Scott