The stage 3 system is the ultimate performance suspension system for your 2009 - current Dodge Ram 1500 4WD. It includes our 2.5" front coil-over kit which offers unparalleled ride quality and performance. The coil-overs are adjustable from 0" - 3" of lift to level out the truck and for fitment of larger tires. Also included are our rear coil-springs which lift the rear 1.5" and increase wheel travel. The dual rate spring is slightly softer than stock in the first rate and 75% stiffer in the second rate for more stability with payload or towing. Lastly, we include our rear 2.5" piggy-back shocks. These shocks are tuned and valved specifically for the best on and off road performance. They are constructed of the same high quality components used in the all of ICON Vehicle Dynamics coil-over shocks. The PiggyBack Reservoir gives the shock added heat dissipation and its locations gives the shock an internal bump zone. This bump zone gives added control and stability when the suspension is pushed to full compression. Recommended tire 305X70R17, Wheel 17" with 4.75" backspacing.