Contains 100% high-energy solvent technology | Helps keep injectors or carb(s) and intake ports and valves clean | Quickly disperses moisture and dissolves gum, varnish, and other fuel residues | Disperses moisture in conventional gasoline | Catalytic converter and oxygen sensor-safe. Item has less than 3% Acetone. | Use on the entire fuel system, fuel tank, fuel lines, fuel injectors, valves, rings and pistons with H.E.S.T. | Ensures higher compression, fewer repairs, lower operating costs and increased spark plug and injector life | Fit type: Universal Fit | Quickly disperses moisture and dissolves gum, varnish, and other fuel residues | Use on the entire fuel system, fuel tank, fuel lines, fuel injectors, valves, rings and pistons with H.E.S.T. | Ensures higher compression, fewer repairs, lower operating costs and increased spark plug and injector life | Catalytic converter and oxygen sensor-safe