just my 2 cents.
at high revs, you will hear a click on the muffler where the exhaust gas will flow straight out without passing the double loop side. it becomes a "straight thru" muffler while at the low end exhaust gas will pass around the twin loops producing two sound in oppsite direction canceling unwanted sound delivering that vroooom vrooom symphony to my ears. this is what i think is the beauty of twinloop and off course why it is pricey.
if i will have the money definitely it is my first choice.