“Air leaks typically impact the engine and aftertreatment system by affecting engine combustion, and changing characteristics of the exhaust,” says Jeff Granger, director of technical services ...

Now the state is targeting dirty exhaust from diesel-powered trains that it says has become a top source of harmful emissions. The California Air Resources Board, or CARB, approved the new “In ...

Its job would have been to clean up the air of some exhaust particles and reduce the noise "pollution" from that supercharged V8 engine. However, there's no room for such compromise in motorsport ...