Powerstroke vs Cummins vs Duramax: Which North American Diesel Engine Is Actually Worth Modifying?

If you’ve spent any time around diesel truck forums, you’ve probably seen this argument play out hundreds of times. Ford guys swear by the Powerstroke. Ram owners won’t hear a word against the Cummins. And anyone rolling a GM pickup with a Duramax tends to back up their argument with dyno sheets. But here’s the …