ReadyLift 69-1242 4.5'' Front with 2.5'' Rear SST Lift Kit with Track Bar Bracket Max Lift: 4.5" - maximum tire dia: 37" 4WD Only 4.5" Front Lift - 2.5" Rear Lift 2014-UP 2500 4WD Only Not compatible with Auto-Ride. For use only with the new radius arm Suspension trucks with rear coil springs For diesel engine trucks Gas engine trucks will sit slightly nose High Not compatible with Power Wagon