Exhaust system Law in the United States and other countries to not have a catalytic converter. Converters may not be removed from a vehicle that is used only for "off-road" driving in the United States. The main purpose of a catalytic converter on an automobile is to reduce harmful emissions of hydrocarbons, carbon monoxide and nitrogen oxides into the atmosphere. They work by transforming the polluted exhaust components into water and carbon dioxide. Cat-back (also cat back and catback) refers to the portion of the exhaust system from the outlet of the catalytic converter to the final vent to open air. This
What Car? displayed alongside the dealer price so users can check whether a deal represents good value. What Car? What Car? is a long running United Kingdom monthly automobile magazine and website, currently edited by Steve Huntingford and published by Haymarket Consumer Media. First published in 1973, "What Car?" is intended primarily as a magazine for car buyers rather than dedicated enthusiasts. In addition to first drives and group tests of the latest models, it contains an extensive buyer's guide section to help consumers choose the right car for their needs and provides tips on how to get discounts on cars. In