The diesel tuning business has changed a lot in the last four years. The Environmental Protection Agency is scrutinizing everybody from huge engine manufacturers like Cummins to small tuner shops.

Despite the recent news that the Environmental Protection Agency (EPA) no longer lists emissions defeat devices as a top priority, there’s still no two ways about it: Tampering with a tune to defeat ...

Mainstream diesel performance hit a home run when Dodge introduced the Cummins-powered Dodge Ram in 1989. In stock trim, the trucks were reliable yet underpowered, but it wasn’t long before ...

Let’s be frank for a moment and tell it as it is: not too many people in the market for an Alfa Romeo Giulia will go for the full-on Quadrifoglio for one too many reasons. In Europe, for example, the ...

Two Michigan-based diesel tuning companies are facing US$10 million worth of civil penalties for their part in the manufacture, sale, and distribution of diesel-emissions defeat devices, a huge strike ...

If the 306;horsepower in the Mercedes-Benz GL420 CDI (pictured) or ML420 CDI isn't;providing enough oomph;to get the kids to the soccer game in time,;Brabus has the solution. The famous German tuning ...