The full ti system on my 848 still excites me, so I'm sure it will be worth the money on the hyper as well.. Their quality is just phenomenal. As far as dyno sheets go, I rode the 848 for a year before ever buying a fuel injection module and I must say, the stock ecu setup seemed to work pretty perfectly with it and my air filter. I would expect the same results. I was definitely skeptical at first when these exhaust manufacturers claim "Works with stock ECU mapping", but in that case, it seemed very accurate.