I think my Z has a very good sound like an exotic italian car...jus a little more rumbly. I have a header, 2.5 exhaust and a turbo muffler at the back. I really like the sound of the Z but if it could sound a little more refined that would be sweet. It definitely sounds like a beast gong down the road playing with the redline like it was a suggested slowing point rather than an exploding point...My Z has topped out the stock tach once or twice...I need a rev limiter so 8k+ doesn't happen any more.