A catalytic converter is a device used to reduce the toxicity of emissions from your Mustang. First widely introduced on series-production automobiles in the U.S. market for the 1975 model year to comply with tightening EPA regulations on auto exhaust, catalytic converters
are still found on all new production Ford Mustangs. A catalytic converter provides an environment for a chemical reaction wherein toxic combustion by-products are converted to less-toxic substances.
Emissions laws in most states require your Mustang to be fitted with a catalytic converter
. If you are looking for some extra performance but still would like to remain street legal install a set of high-flow mini catalytic converters