If you do not want to install an extra leaf a lot of guys install some air bags to help give their truck some more load control.
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2008 3500 Laramie QC 4x4 LB DRW 6.7 CTD Auto LSD 3.73 EJA EPP 5" TBE AFE CAI -EGR 3.5" BOOST TUBE AirDog 150 RWX
Most wanted mods: Wild Card Customs Intake Horn,Twins