Did you know there are severe restrictions on the types of modifications that can be made to engine exhaust systems on 2007 engines?

The exhaust systems are now part of the engine emission controls and can’t be altered without affecting engine performance, compromising safety or potentially voiding engine warranties. Specific restrictions depend on the engine and chassis manufacturers. In general, no modifications may be made between the turbocharger and the diesel particulate filter, and only limited modifications may be made between the filter and the exhaust outlet. Restricted modifications include relocating components or rerouting exhaust pipes. They also may include adding components, such as exhaust brakes, or extending pipes.

Departments are strongly advised to consult with the engine or vehicle manufacturers before making any changes to the exhaust systems on apparatus equipped with 2007 engines.