I just got a 07 Charger RT with the Road and Track Performance Package on it. The package says this is an upgraded exhaust system...Is it worth swapping this for an aftermarket or is it pretty similar to a better exhaust? I'm very pleased with the car so far, I just hate how quiet it is. I traded in an 05 Ram 1500 Hemi that I put Gibson duals on and I miss the head turning rumble. I certainly don't mind the head turning I get just from the looks of my new car, but I miss the deep throaty sound.