5000 rpm: Waaaaaaaaaaaaaaaaaaa
5k-8k: WAAAAAAAAAAAAAAAAAAAA!!!!!
Im running an Amuse titanium, 70mm dual on my S2K and its *nuts* between 5K and 8K, really exotic sounding mix of throaty, raspy (its a beautiful exhaust, only 15lbs, but its got a bit of resonance, not fun with the top up - if I daily drove the S, Id swap it back to stock)