[Tangent]

Flat out BS. If this product this even a tenth of what it claimed they wouldn't be selling it to private parties, they'de be selling it manufacturers. This way they would not only be making more money than they could spend, they'd also be fulfilling their claimed mission of protecting the environment be ensuring that all new cars got this technology. Manufacturers would kill for this kind of claimed reduction because it would let them sell more SUVs without killing their CAFE scores and they could more agressively tune their engines for more power while still meeting emissions requirements.

This is just another case of something sounding just plausible enough to sucker people into buying it, but proven to be worthless by the companies that have the resources to really verify the claims.