Mic is right on the money !!!!

I have a 08 2500 Duramax CCSB 4x4 with lift torsion bar keys and with the bars level up, and 35" diameter tires. All stock and a Nelson tune.
Launching 4WD is like fightting with a bull....you have to hold the steering wheel with all you got (wonder if that contributes to the clunk in my steering shaft lol)

But on the 02 turbo truck I have lowering torsion keys, and the torsion bars almost all down. Truck launch straight as an arrow with little to no figth !!! And I have 20" on 295-45 rubbers !