It is a magnet that you install around your fuel line. Allegedly it aligns the atoms in the fuel so they will burn better. Ok, so I believe that
, but then the aligned fuel goes into the carb float bowl where it gets all jiggled around and mixed up. Then it gets squeezed through jets and booster nozzles and gets tumbled around passing through the intake manifold on its way to the cylinders. So much for any atom alignment I'd say.
Want to try it for free? Just wrap a section of fuel line with some hardware store magnets and a hose clamp or two. Better yet don't bother. Spend your time and money on something worth while. Crap is a polite word for it.
Mike