Owning a Cummins-powered rig is already a flex. That deep, rumbling idle. The way the turbo whistles when you roll into the throttle. The satisfying grunt as it effortlessly tows what would make most ...

Nothing can ruin a perfectly good truck like the temptation of adding a cheap power upgrade. If a diesel engine gets the wrong parts, or even if the right part is installed before the vehicle (or ...