any one ever heard the summit racing's cat back exhaust setup, id like flowmaster, but these seem to have great prices

 

I have had their turbo mufflers and they sounded ok, but not what I wanted on the car. However, the performance was the same as dynomax super turbos. I ran that car at Gateway and with either muffler set up, it ran the same e.t. and m.p.h. Hope that helps you.