A Roseville-based truck parts manufacturer on Tuesday agreed to pay $1 million after pleading guilty in Sacramento federal court to conspiracy and for making and selling illegal “defeat devices” that ...

Yet another tuning shop has been fined as part of the U.S. Environmental Protection Agency’s ongoing war on diesel emissions defeat devices. At the receiving end of the punishment this time around is ...

A tuning company in Roseville, California will pay $1 million in fines and penalties after it pleaded guilty to selling thousands of products that allowed pickup truck owners to bypass the emissions ...

Aug. 1—If you've ever been behind a lifted pickup truck that spews out dark clouds of smoke in what is often referred to as "rolling coal," then chances are that the truck you're seeing could have ...