Heres a clip of the series 50, sounds alot different then the common 40 series. Ive heard the 40s and dont like them at all, some of the dynomax turbos, corsa, and others, I just think they have a kinda ricer sound to them. This STS is the best tone that Ive heard IMO, then again not many people put an exhaust on thier caddy. Hope this will help! http://www.youtube.com/watch?v=GehWVg8v-IMI know a bunch of Midas mgrs. They tell me that most people who buy Flowmasters want to get rid of them after about a year. They just become disenchanted with them. We all have our own taste.
As someone else said, check threads. You can be very creative with an exhaust system.
thank you for the propsIf you want to know what to get talk to the guy right above this post he made his own for his eldo and STS.
Sorry Jay I had to throw you out there because your the only one I know that made your own exhaust.