Thanks, 4by4, for taking the time and $ to do a careful test and post your results!!
9 HP instead of
IPD's dyno data showing 20+ HP
is a bit disappointing. It will be interesting to see how the other pending dyno results compare with this as they come in. However, 9 HP, and better low end torque, is certainly worthwhile IMHO. At about $110/HP it's fairly cost effective in comparison to some other mods (e.g.
Capristo is over $200/HP).