I could tell a big difference with the SBS on my 3500 dually but still had a little wobble. I just got the adjustable trackbar and when installing it, noticed that the stock trackbar used a 14mm bolt on the frame end with a 16mm hole in the trackbar bushing  . I had to bore out one of the BD bushings but the end result is remarkable
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'07 3500 DRW 4WD Mega Cab, 6.7L, G56 6 speed, 3.73 LSD, Rancho 9000 XL shocks, 2" levelling kit, Firestone Ride-Rite's, AFE CAI with dry-flow, Banks DPF-back system, Mag-Hytec, BD SBS & trackbar, BD Ultra X Tuner,16K Pullrite slider hitch.
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