I had the WS turbo muffler on my RSX and it was nice at an idle but droned hella loud at 3-4k. I got tired of not being able to hear in the car (even with 2 layers of dynamatt) and now I have the greddy EVOTT. The car still has a nice deep sound at idle (sounds like a 70s muscle car ) and there is no annoying loud drone when cruising on the freeway.