I have a dual supertrap setup on my car. I agree with Davy in that I dont't want to bother taking plates on and off but I am planning on changing them due to the sound issue. I don't think they are too loud for the street, I just want a quieter exhaust for a sleeper car. I had a supertrap on my celica a long time ago and if I remember right, it did have a bit of a raspy sound but it was very deep sounding. The sound is less raspy on a V8.