Thanks for all your help guys. I'm gonna go with the 2.5 downpipe since I'm not gonna do any perf. mods to the engine, and run the hi flo cat and o2 sensor. Do you guys like the magnaflo's or the flowmasters best for these cars?
It's a preference thing. The best I've heard is actually Dynomax with a 3" DP (he is cammed) and glasspack replacing the stock resonator. Sounds good. As I always say - a GP will never sound like a Mustang GT. Ever.
-Swash
I'm sorry, I can't hear you over the sound of how awesome I am...
2004 IBM/Black/A4 GTO -- 1 of 273 - and the slowest
2002 Galaxy Silver GTP - a few mods - sold