Hi guys.
Got a XT660X on the dyno the other day.
Was equipped with a DNA stage 2 air cleaner, no snorkel, head was ported (so they claim) and air age slip-on pipes with a stage 2 raptor cam.
If you look at the dyno results, BLUE is a stock XTX-06 model. Red is the same 06 model XT with stage 2 DNA, powercommander, Leo Vince pipes and custom mapping.
the Green is an 07 XTX, with the mods above and the stage 2 cam.
Note, I also added the PCIII map I made for this bike.