Mike,
This was done on a dyno jet 250i with a Race Tuner. Zippers 575 chain drive cam, with D&D's with stock baffle, HD SE A/C and Zippers element, and Race Tuner only mods done to this bike with. Remember this is not a gear drive cam and it was run in SAE mode here in Florida. Under STD we gained about 3 hp / 3 tq and we left the air cleaner on with its cover as well, and we had 40 lbs of pressure in the rear tire.
I would expect the Thundermax to get better numbers it has over twice the tunability points to ensure a better running motor. If Dan wants he can send down a map in the tuner and ask Jim to run it again. I am quite sure it will pick up a few ponies.
-harry