"Thousands of tons of pollution spew into the air in the US from devices that proliferate online and in body shops"
"When officials at the Environmental Protection Agency began investigating Freedom Performance, LLC, they didn’t have to look very hard for evidence that the company was violating the Clean Air Act. According to legal documents, the Florida car parts distributor literally advertised violations on its website.
“The road to hell is often paved with good intentions,” stated one ad for a kit to remove federally required emissions controls from diesel trucks. It identified a particular emissions control system that “is certainly noble in its intent” but “in reality it is putting your engine through hell … The best solution is deletion.”
According to the EPA, Freedom Performance was advertising defeat devices –hardware and software that bypasses or eliminates emission controls. The Clean Air Act forbids tampering with these controls, and violations carry heavy fines. But defeat devices – also known as “delete devices” – are popular with many vehicle owners."