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 ...

Two Michigan-based diesel tuning companies have just been hit with $10 million worth of civil penalties for their role in the manufacture, sale, and distribution of diesel emissions defeat devices.

One heavy-duty engine choice transformed a basic pickup into a platform that significantly reshaped diesel performance and ...

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 ...

From ECU remaps to hardware upgrades, diesel truck tuning can unlock huge horsepower and torque gains for Cummins, Duramax, and Power Stroke engines. With the right balance of performance mods and ...