This is the same thing Man-A-Fre had in the 1970s. It was a platinum alloy screen that fit below the carb. They made the same claims about better mileage.Drummerboy said:The Fitch® Fuel Catalyst is composed of a heterogeneous metal alloy that is a true catalyst by definition in that it affects, but does not become a part of, the fuel. The Fitch® Fuel Catalyst improves the combustibility of hydrocarbon fuels by treating the fuel immediately before it enters the combustion chamber.
Got me sold right there.....I don't know what heterogeneous is but it sounds like a problem solver.