I've got a Stebro Race exhaust and it's literally the size of two family sized soup cans, the mufflers that is. It has resonance up to 3K rpms but after that it sounds so good, a bit
Ferrariesque.
I have a rev and idle clip on youtube. I've got a bunch of in car video from a pca event I'm trying to get up on youtube.
http://www.youtube.com/watch?v=-N0gG2d5grw