What is a catalytic converter? This topic contains 1 reply, has 2 voices, and was last updated by Surjeet Sankararaj 5 years, 2 months ago. Author Posts June 10, 2013 at 4:51 pm #2453 KingParticipant Points: 96 What is a catalytic converter? What are its types? June 10, 2013 at 6:27 pm #2473 Surjeet SankararajKeymaster Points: 631 A catalytic converter is a device used in petrol engine vehicles, to convert hazardous gases in the engine exhaust to harmless gases. The two common types of catalytic converters are: 2-way catalytic converters 3-way catalytic converters Author Posts Tagged: catalytic converter You must be logged in to reply to this topic.