These are outrageous claims
"Will the Turbnado void my vehicle'* warranty?
Absolutely not!! Federal laws state that adding aftermarket items to your vehicle cannot void the dealer warranty."
Can someone point me to this law? I know of many Edelbrock parts that will void it
"Is there a guarantee?
Yep! If you are not 100% satisfied with this product you may return it within 30 days for a FULL REFUND, minus shipping costs.***"
the part is $2....shipping is $16
"Exactly how much savings/power boosts can I expect?**
EPA tests have been carried out on stationary vortex generators that have recorded gains in horsepower and gas mileage, resulting in up to 20+hp gains and 24%+mpg gains. Other tests have recorded up to 35hp and 31%MPG!* Outcomes differ from vehicle to vehicle, but overall the Turbnado is an economical way to aid in the performance of your vehicle.
After hearing the gains that our customers have shared with us, we figured that the average gas mileage gains range from 2 MPG all the way up to about 8 MPG.* "
right on there it says there are no true fuel economy gain mods.