Mark Peterson
Hi, I'm Mark Peterson. With 20 years under the hood of heavy-duty diesel trucks, I’ve seen every wrench turn and sensor failure imaginable.
As the lead editor at EGR Performance, my mission is to help Powerstroke, Cummins, and Duramax owners push their engines to the limit without the headaches of Limp Mode or endless CEL codes. I don't just review parts—I provide field-tested solutions based on two decades of diagnostic data.