I have the 2.5" diameter with a 4" tail pipe one on my car. I used to like it but not it really irritates me. It's noisy, it drones and constantly drowns out any other sound including my stereo so I have to turn it right up to be able to hear anything. I've put up with it as the car isn't an every day car.

What are the other options bearing in mind that my car will be producing quite a bit of power next year? I'd still like to keep a larger diameter tail pipe if pos.