Well got my ASV's today and my Two Bros exhaust. ASV'S are amazing. I love them. This is my first road bike and they are just as awesome as they are on quads. The two bros looks amazing. Sounds awesome at idle but is really loud around 4-5000 rpm. Have not had my bike above 7000 rom yet due to it being so new. Really hard to be good!!!! Anyway i may look into a quiet core. It is so loud cruising. Love the sound but damn.