I bought an Akrapovic GP but decided it was just too loud and I'm not fussed on the look of Akra's high level exhaust. Has anyone on here got a Yoshimura Alpha T? They aren't overly loud (quite a nice boomy sound - see video below) and look good imo: http://www.yoshimura-rd.com/shop/honda-cbr1000rr-sp-sp2-2017-exhaust-systems-genuine-accessories.asp
Test rode with one on and made the fuelling out and throttle plus pops and bangs everywhere so not for me...stuck with the original once that gets some miles in sounds quite good on full chat,,,,
I have it on mine and its good, if you take baffle out its about as loud as the arka I run mine with baffle in always; passed rockingham noise test 104db at 5k rev Fueling and lowend will come back after a tank or 2 and I will run smooth again