Which jet kit is better or is there a difference?

If not mistaken, Dynojet make the K&N jets as well. Folks have been
talkin' about gettin' a bigger factory jet from the dealer. You may want
to do that before spendin' all that money on a jet kit. I wish i would have.
I bought two Dynojet kits for ours. They run a lot better, but i put the
biggest jet that comes with the kit which is a 134 & they still seem to run
a little lean.

i would listen to railroader...I am hearing the same complaint from many abot the jet with the kit not being big enough and the kit being a waste of money