Just wondering have anyone ever used one of these products and guarantees results?

These products claims to have an impact on air intakes and gas mileage. I was wondering if anyone have had one or tried it and would like to give me some feedbacks on its quality. Thank you.

Here are some links.
Floblade :
http://cgi.ebay.com/ebaymotors...QrdZ1

Tornado :
http://www.tornadoair.com/

 

I believe the general consensus is these aren't wroth it.

 

Don't waste your money. Don't even think about it.

 

based on your feedbacks, i can tell much people disagree on the product. Thank you so much for your feedbacks.

 

i was going to agree with them but I see you came to your senses

 

just think about it what good does having an air "funnel" do, as soon as it hits the butterfly flap it goes normal again