I've got a 17 gt 6 speed performance pack car. Right now I just have muffler delete and the rest of the exhaust is all stock. It sounds ok but just not what I'm looking for. I want louder for sure. I know I want catless long tubes and h or x pipe. As for cat backs I've thought about roush, borla, corsa, and mbrp. Not sure which one to go with for the best sound. A little raspiness is ok but not a bunch.