Honestly I have never heard a Two Brothers slip-on. Best thing to do is hang out with other guys that have sport bikes and see what they have and see what you like. With a slip-on your not going to gain any HP or tourqe. So it mostly just comes down to the sound and look you like.
A forum community dedicated to Kawasaki Motorcycle owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, off-road, touring, street bikes, and more!