Among all the ways you can upgrade your diesel truck, the exhaust modifications ... way to achieve a more aggressive exhaust tone without popping the hood, making any modifications to the engine ...

Diesel exhaust fluid (DEF) is nothing new. GM’s Duramax-powered Chevrolet Silverado and GMC Sierra 2500HD and 3500HD pickups have had used the stuff since 2011. So has Ford’s F-Series Super Duty.