"Defeat devices significantly increase air pollution from motor vehicles, particularly in communities that already are overburdened by pollution," said David M. Uhlmann, assistant administrator for the EPA's Office of Enforcement and Compliance Assurance.
"Use of illegal defeat devices has gone on for far too long. EPA will use all of its enforcement tools to hold polluters like COBB Tuning accountable until these illegal practices stop."
Since 2015, the company has sold 90,000 illicit products, including exhaust systems that enabled vehicles to bypass pollution-stripping catalytic converters and software that augmented engine combustion, the EPA said.
These so-called 'defeat devices' resulted in the release of smog-forming emissions and other pollution above federal standards.
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