ok, so i've already gone ahead and had a muffler shop remove the cat and exhaust res and replace the stock piping with a free flow 2.5 piping, and just left the stock muffler on along with the stock tip. now i'm wondering should i go ahead and replace the stock muffler for a high peformance one, only thing is if i do, i do not want a fart cannon muffler/tip combo. any ideas or places i could find a high perfomance muffler to replace the stock one and keep the stock tip?