Once I read of Fullsac on the internet I thought I'd try them out. I live in Sacramento so I first went to them to grind out the CC and install their baffles. I was extremely happy with those results. They went as far as telling me about when to arrive at Lake Havasu, AZ (HOT HOT HOT), where to fill up with fuel and all the small things. Steve is a great guy besides being a master wrench as far as I am concerned. He has the patience to answer all of my dumb questions. After having this first work done I went back and he installed the 254 cam. WOW. After getting that done i went on a long trip up to SD, WY, CO, UT and back home to CA. The engine performed flawlessly. Absolutely no ping under any conditions. I checked gas mileage and got anywhere from 45 to 50 MPG. This bike flys folks. I highly recommend this simple change for increased performance all around. You can pass those other vehicles in a breeze. The great thing is Fullsac is GREAT to work with. I feel as though I also have a new friend in Steve and his brother. I will definitely keep in contact with them.