Brother these little auto installs isn't even where the big money will come from.
Think of all the old vehicles, city, state, govt, etc... New EPA and emission laws will soon make them obsolete... Instead of junking them, why not bring the emissions to nearly nothing using HHO....
Go bigger. Trucking companies. Agriculture equipment. Generators in natural disaster areas.
Anywhere and engine is running a machine, HHO can be utilized.
Personally I think this is the biggest home run PBHG has hit.