Prosecutors say the ring smuggled thousands of illegal devices that let diesel-truck drivers belch hundreds of times more ...

The practice known as “rolling coal” occurs when a diesel truck is modified so that it can intentionally blast black smoke in abundance, and its origins can be traced back to truck pulling or ...

New Jersey Governor Chris Christie has signed a law making rolling coal illegal in the state. The bill was introduced less than a year ago after a pickup belched soot on a State Assemblyman's ...

It's called "Rollin' Coal," and it's what the cool kids who don't like the EPA are doing. How does one roll coal?Take one diesel-powered vehicle, usually a pickup, remove its EPA-mandated ...

"Rolling coal" - when drivers blow thick exhaust clouds from the tailpipe of a truck - may be obnoxious, but it isn't illegal in most US states. Only a handful of states including Maine ...

Defeat devices are meant to boost the performance of diesel vehicles, but are often used to outfit trucks for "rolling coal." Rolling coal is the practice of revving a truck engine to blow a thick ...