That's the kit I have, can tell you that the butt dyno registers a noticeable grunt and smoother down low. There's a weight benefit as well. It has a nice, deep sound which I love... Here's some info from another owner...
1100 new exhaust benefits? - Ducati Monster Forums: Ducati Monster Motorcycle Forum
1100 new exhaust benefits? - Ducati Monster Forums: Ducati Monster Motorcycle Forum