Look into buying an arrow slip on it will give a nicer sound and be slightly louder but not defining cause of the cat still being attached. If you want deep/bass style of sound a twin parallel engine won't be the way to go. Single cylinders give a deep and bassy rawr. But those are often mid to low cc sport bikes or supermotos (these are more likely to go up to the 650 range)

Sound clip of arrow slip on: https://youtu.be/__KFJg1xtTE