I'm going to purchase a CNT cat-back. It is a 3 inch 304 system. I think this will be a good upgrade. It will probably be the last upgrade until I throw a supercharger on it. Problem is...I like the way my car sounds now. I have the mods in my sig, and the car sounds great. Not too loud but she has attitude. And the perfect amount of drone...I LOVE drone believe it or not. So hopefully the CNT system will not be overwhelming. I heard the sound clips and it sounds good to me. We shall see. I will order it probably later this week and I'll keep you all updated!!