I know a lot of guys don't like the fuelpak but it really woke my bike up!!! I can't be more happy!! I have V&H tapered slash cuts with a V&H naked ac and HD stage one download... I'm using the recommended V&H 2533 map my throttle response is much better and I have a lot more seat of the pants passing power.. So that's my good fuelpak story

 

Imagine what fun you could have with proper fuel management! (It will improve your MPG, too.)

 

I know fuel pak did not work on my 2010 sportster but I agree it does work on my 2009 RKC... Why ? I don't know. Maybe because I and the OP stated we insalled on top of the stage one download ...My cobra unit unit left me stranded on the sporster and my MPG was down to about 30 mpg. Are there better options ? Of course... But some things just work If your happy..