Exhaust Question

[BD1]

Ok my friend has a 2002 WRX and he hasn't done any modifications to it yet, he just decided he wants an exhaust, I told him about the 4Cyl and Air Flow, so he wants a good one with not a lot of noise, but enough, and maximum power, I guess he has unlimited funds for it. Please post your suggestions, or what you have and how it works?

[Kobiyashi]

TBE from TurboXS (Stealth) with Stromung Muffler is nice and deep, plus adds a nice hit to HP (get the uppipe also), its not cheap, the ticket will be 1100 ish if you get it through the right places.

[KRZYKOREAN]

The HKS Titanium is dope..and BD1 you look familiar