I have had the Greddy EVO on my twin turbo convertible (as well as my N/A convertible prior to the swap) for two years now. Personally, I think the exhaust is too loud and raspy, especially at certain RPM ranges. I have experimented with different resonated and non-resonated X and H pipes and found that a resonated H pipe with the Greddy EVO sounds pretty nice with a minimal decrease in performance. If I had it all to do over again (which I am now in the process of doing) I would have saved a little more money and gone with a Labree system with a resonated X pipe. Just my .02.
