I completed a stage 1 on my 2013 Ultra last month. De-catted head pipe, CFR slip ons and Alley Cat K&N air cleaner. I tuned it with a Power Vision 1 and map from Fuel Moto. Runs cooler, better performance and believe it or not my mileage went from 41 MPG to 42.17 MPG. I don't know how to explain it as I figured the tuner would for sure be adding more fuel? This stage 1 just keeps getting better.
Bill