On September 12, 2019, the U.S. Department of Justice and the Environmental Protection Agency (EPA) announced a settlement “with Performance Diesel Inc. (PDI) to resolve alleged violations of the Clean Air Act (CAA) associated with the manufacture, sale and installation of aftermarket products that defeat the emissions control systems of heavy-duty diesel engines. As part of the settlement, PDI has agreed to stop the sale of all products the government alleges violate the CAA. PDI will also pay a civil penalty of $1,100,000 over two years due to their limited financial ability to pay a higher penalty.”