My brother's truck is an 03 2500 4x4, and he's been running an Edge EZ, Dynomax exhaust, and BD X-intake w/flow adapter. Just installed the Power Pup on Performance setting and all we could do was laugh as we smoked up the street with tire & exhaust smoke , this was stacked with the EZ, but we'll be doing some testing w/o also. From a dead stop, no power braking, I stood on the throttle and started to roll forward, and it lit up the tires and I was backpedalling all the way through 3rd gear, finally backed out around 60 mph, was still smoking the tires to 55mph. Max boost 39 psi, max egt 1337. All I can say is if you're tired of waiting for EDGE, this thing is awesome!