[Boxtaboy]

I've seen someone install the Fabspeed cat bypass pipes at a local work on cars day, and after the installation, I could hear absolutely no difference in sound to be honest. I heard it while he revved it from idle, and also driving right next to him while we were driving home. He, however, kept his stock exhaust on the car, which was a 2000 S. I'm not sure if the sound would be any better with a modified exhaust, but maybe it would.

I personally don't think you gain that much sound or power from it, but you do lose a lot of weight by removing those heavy cats. That's probably the best part of adding them. LOL