when i had my 318 in my dart i ran the stock manifolds and stock down pipes then into a 2 1/2 duel system. sounded bad ***. it only cost me 300 with the flow master mufflers.
He's right but the best bang for the buck is the thrush welded muffler that you can get at autozone for about $30 each and they look and sound really good! I used them on my scamp. You wont be disappointed in the quality,sound, and price!:blob: