Okay, I'm the guy that actually bought one when they first came out. I was naive, I'll admit it. Enough is enough! I'll make a deal with you! Dyno your car, buy ONE, then dyno your car after you've installed it. If you can prove that it actually adds HP or Torque. I'll pay for your dyno testing! Because fuel economy has too many variables I won't take that into consideration. That's how impressed I am by their product! While your at it, get some prolong, and then drain your oil before the dyno test. Bottom line don't buy anything you see in an infomercial (except a George Foreman).