I just purchased this filter (about 800miles on the BMF) because I wanted my bike to breath easier. I felt this high flow filter would provide some noticeable performance increase (I wasn't expecting a night and day difference) with out paying the HD price tag. I don't recommend it. Comparing it to the HD stock 114 oval air filter, just not worth it. I felt no change at all. Very disappointing. I'm not for nor against HD parts. If the butt dyno says there is something different, there is. As soon as I changed to the SE extreme ventilator and the throttle response was different! Snappy!