Another interesting observation - the dyno graphs that they show in the article only show the engine speed range from 5,250-6,250 rpm. In fact, if you look at the low and high ends, it appears that the non-modified vehicle has higher horsepower and torque. Makes you wonder why they don't bother to show the entire speed range, or at least down to say 2,500-3,000 rpm.

Anyone care to guess at an answer?