Chris Jewett early 04 dyno.jpg
Here's a dyno graph from an early 04 that I tuned yesterday. It was a brand X mobile dyno. This is a stock truck, breathing through stock airbox, stock muffler is gone with a small mbrp in it's place. 449hp and 983tq. This truck runs smooth, no timing pop at all, responsive, smoke free power. Glad that the early common rails can finally be tuned right!