I also just upgraded my exhaust with a Magnaflow 14379 two in two out. The car is now a true dual with all cats. I will eventually take the second cats off and replace with X-pipe and change out the tips for something different. The sound is alot louder, and I am hoping the raspy-ricer tones down a bit, but the deeper gurgle is great. The stock muffler is HUGE and am betting it is close to 35-40lbs, with the new one being under 10lbs. I need to take some pics.