When I got around to installing the PC111 , I already had Mistral cans ,stooki crossover & K&N pods. There was only 2 places in this area that would dyno tune , one was HD place that wouldn't touch the Guzzi & the other place was jap crotch rocket dealer that made me feel real nervous . Gruff but loveable Mike loaded a map that he got from Todd & the results were mind boggling, it would pull the front end off the ground 3 to 4 ft with just throttle in first gear.I lost a couple of mpg but the performance improvment was more benificial to me. I can only imagine what it would have been like with a proper dyno tune. I'd like to add that Todd at guzzitech offered to hold the guys hand at the jap place to make me a custom map ,but I just felt uneasy with those guys.I also swapped the pc111 on my sport to my Quota with no changes & rode it around & it run a hell of lot better too.My opinion which I know doesn't mean shit to most of you is that you really owe it yourself to try one If I had a laptop I could do this myself ( thats how easy it is to change maps ) They now have a gizmo that uses a 9 volt battery that allowes you to load maps off your pc in you trailer & go to your shop & down load a new map The new USB model is even more flexible Theres no substitute for a custom map , but you can get pretty close with the availble maps