I just tried to check online for CAD2000G and the only link I found is a blogger account. The site cad2000g.com is suspended.

Now after watching the video, it said that it has two patent applications which I cannot find with the US patent and trademark office. Hmm...

I also checked the California Air Resources board and it said that CAD2000G "has been found not to reduce the effectiveness of the applicable vehicle pollution control system." Here is the link http://arb.ca.gov/msprog/aftermkt/devices/eo/D-566.pdf

Sorry man but we need hard facts with scientific basis. Testimonials are just not believable. Heck, any Tom, Dick and Harry can claim that their vehicle suddenly got more efficient but without scientific testing, the climed efficiency may have been psychologically induced. Nobody wants to admit that they shelled x-amount of money for crap.