Only have 370 miles so I don't think I could give any info on fuel economy one way or the other. Seat of the pants on ride today seemed like engine was not working as hard to go along at 70. But that very well maybe in my mind. Kinda like they always seem to run better after a good wash. After seeing what is inside the pipe I am amazed that they run at all.tomatocity said:If you have previously tracked your gas mileage I would like to know if there is a difference.