Three-Way Catalytic Converters

3-Way Catalytic Converters control exhaust emissions from stoichiometric CNG, LPG and gasoline engines. 3-Way catalytic converter technology cannot be used on lean-burn CNG or diesel engines (see SCR for diesel NOx control). Three-way catalytic mufflers are the most effective way of controlling carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx) emissions with simultaneous reductions of up to 90-99%.