I special ordered two thrush mufflers through Advanced Auto and had them installed at Cole Muffler Shop. It needed a couple of custom pipes and they have a guy that can do anything with an exhaust system. I only needed a couple small pieces the system was ok except for the mufflers. The price was very reasonable compared to other places. The car sounds great. I live by a super modified track and they are just below a super. Definately have an answer to these loud Harleys. I still want as much info as I can get about installing headers and side pipes. I'm a little apprehensive about getting into more than I can expect. Any info would be appreciated. I had Thrush on a 65 Barracuda I had many years ago and they are better than ever. I believe DynoMax are made by the same Co.