Ktm 2 into 1

Just got my bike back after installing a 2 into 1 exhaust. Man, it's like a new bike! It revs up so fast i first thought the clutch was slipping!!!!! It revs far freer and quicker. Can't tell if top end has been affected. I got to 160 two up and she was still pulling like a train. Overtaking accelleration (which was always good) is now eye watering.
As soon as I work out the photobucket thing I will post some pics.