Liqui Moly Catalytic System Cleaner, 7110 Protects the catalytic converter from clogging with soot. Cleans the injection system and the combustion chamber. The combustion improver works directly, which leads to an immediate, measurable reduction of the pollutants. Clean engines use less fuel and emit less CO2. Prevents corrosion in the fuel system. Tested for use with turbochargers and catalytic converters.