I installed the Dyno Tuned slipons, PCV, and ac about 3 weeks ago. I'm pretty happy with them. Performance is better, sound is better (not as nice as Rineharts but lots better than stock). My mileage has dropped considerably. Maybe my right hand is partially to blame with that. After a few tankfulls I hope to get a better idea. Keith sent me another map for better mpg. Their service is very good at Fuelmoto and someone always answers the phone. I kind of wish I bought the Pro-Touring mufflers but I really like the looks of these dyno tuned slash ups and this setup was the best bang for the buck.