System Benefits: Complete Bolt in System Excellent Highway Ride and HandlingGreatly Improved Off-Road AbilityHigh Clearance Lower Control Arms Front and RearIn Vehicle Adjustable Front Upper ArmsLong Travel Functional Multi Rate Coil SpringsPRO Front Sway Bar Disconnects/Extended Links PRO Rear Extended Sway Bar Links Repositions the Rear Axle Back up to 1 Over Stock33 or 35 Tires (OEM Fenders)37 Tires (Flat Fenders)Abuse Proof Lifetime Warranty on All Hard Parts Upgradeable to any other Rock Krawler System System Includes:(4) Long travel functional multi rate coil springs(2) Double adjustable track bars made from 1.5 solid alloy steel with Anti-Wobble joints (4) High clearance adjustable lower control arms made of 1.625 solid alloy steel (2) High misalignment double adjustable front upper control arms made from 1.25 solid alloy steel (2) High misalignment double adjustable rear upper control arms made from 1.25 solid alloy steel(2) Adjustable front sway bar disconnects(2) Rear extended sway bar links(1) Rear track bar relocation bracket (4) Long travel stainless steel brakes (1) Pair of sway bar link straps(2) Rear coil spring degree wedges *includes all Hardware and detailed Instructions. RRD Spec'd Prodigy Shocks 2 Door Front: RRD02173 Rear: RRD02174 *Requires 2 bump stops front and rear 2 Door Front: RRD02173RR Rear: RRD02174RRD, RRD02174RRP *Requires 2 bump stops front and rear Bilstein 5100 Shocks: Bilstein Part # Bump Stop Front 24-186995 2 Rear 24-146715 2 (bump stops are sold separately on our components page) If choosing a brand of shock that we have not provided a part number for, match your shock choice as closely as possible to the generic length recommendations below. (We can not ensure that the valving profile in your shock choice will pair well withour kits. This is why we recommend using our RRD Racing shocks or the providedBilstein part numbers) Generic Front Shock Recommendation with 2 bump stops - 16 Collapsed to 28 Extended Generic Rear Shock Recommendation with 2 bump stops - 16 Collapsed to 26 Extended NOTES! - We typically recommend 4.5 of back spacing on rims for 33 and 35 tall tires.- We typically recommend 3.5 of back spacing on rims for 37 tall tires.- For 2012 and newer models an aftermarket front driveshaft with 2 O.D. steel tubing is recommended, but not required.- The X Factor System allows the rear axle to be pushed back up to 1 over stock which perfectly centers the rear axle assembly under typical aftermarket flat fenders. It also allows for larger tires without contacting the rock sliders or rear pinch seam.