Just like the turbonator... if this product actually fulfilled its claims, wouldn't they rather market it to automobile companies for mass production on models. I think the automakers would be rather happy to get a product for ~$100 (adjusted for mass production price) to get their vehicles an extra 3-5 MPG which would sit well with the consumers in this economy and fuel crisis. In addition to this, the makers of this product would also be glad to sell their product to larger companies so they could put it on every model the auto companies sell and make a fortune/save the environment (whichever the makers of blade exhaust tip had in mind).
I would love for something like this to work and someone to come on this forum and prove me wrong with solid evidence that the product even worked to improve FE by 5% and reduced emissions by any at all, but until then I believe this product goes in the same category as:
http://motors.shop.ebay.com/items/ga...8QQ_pcatsZ6000