Fixedleave that to cars that have more cylinders.
Fixed
Eh, Theres no use for duel exhausts at all with our cars, Its no V6. We just need a 3" Exhaust and we will do fine, and that duel exhaust posted, i wouldn't do that it looks tacky because it doesn't help performance
if it looks good, then theres no harm. personally I would never do it just because I see it as wasteful.. buy one NICE muffler for the price of 2 bad ones and it'll sound better.
Most of you guys running the T25 with boost below 10 PSI would be better off with catless 2.5" exhaust