Yeah, my Chi-town boys representin'!!! Ok, all kidding aside, one of my friends tried one of these on his 97 LX450 and said he did not notice a difference at all. If I remeber correctly, the box also said that the Tornado-thingie also boosted HP, too. He didn't do any dyno-tests or anything, but he said he couldn't even tell he installed the thing. Then again, his truck was shaped like a huge brick, and was underpowered with the I-6.
I saw the infomercial a few years back myself, and thought it was a joke...