SOG replaced my stocker with a Cobb catted DP this afternoon. Everything else on the car is stock, including EM. Even with the stock 06 ECU mapping, there is a very noticeable increase in pwr on the butt dyno. I guess I didn't expect that. One other thing I do notice (and I'm sure the car is still sorting out the mod) is that boost has more of an on/off switch effect now, versus a slower build before the pipe swap. Anyhow...For those of you sitting on the fence with this particular mod, I recommend it. Next week is AP Stg2 protune with Scott S. Will be interesting to see what that yields.
Pipe was $575. Yes, I know Cobb is not the cheapest DP around, but I liked the position of the cat (not in the neck of the pipe), in addition to the cast SS bellmouth. SOG trimmed the stock heatshield to fit the wider bellmouth.