I have Dan Moto GP exhaust on my CBR1000RR. There are numerous videos on youtube with dan moto exhaust so you can hear it, mine is the repsol. I was going to replace the Two Brothers M5 VALE CF Cans on my XX to the Dan moto gp cans when I return from deployment. Its a sweet sounding exhaust deep not ratty! Love em. was going to stock some because DanDan told me most americans are afraid to buy because of being in china but then I ended up deploying, plan to stock and sell some when I get back. when you buy from him tell him Chad aka cbr_bear sent you and to take care of you!