Skyjacker re-engineered the Super Dutys suspension via an impressive highest-level front 4-Link Conversion with FOX 2.5 Factory Series Coilover Reservoir shocks. Formed from 2-inch OD x 0.250 wall DOM tubing, both pairs of control arms are adjustable Flex Links. The adjustability allows proper caster settings to improve handling. Flex Links have a forked clevis end at the lower axle mount. The upper bracket mount has 1-1/4 in. forged rod end with RB style rubber bushing. You are replacing the OEM coil spring \ shock set-up with a peak of perfection coilover shock assembly with mounting brackets. The upper mount \ reservoir mount bracket bolts into the OEM coil spring bucket location. The lower mount into the coil spring seat location. FOX 2.5 Factory Series Coilover Reservoir shocks deliver incredible performance and precise controlled dampening. Specifically engineered and performance tuned for this ride height and vehicle weight with fine tune ride height adjustability. Massive 2.5? Smooth bore and honed seamless, 6061-T6 hard-anodized, high flow aluminum piston, 7/8 in. hardened NitroSteel(R) Steel carbon shaft, greater fluid capacity with numerous other high end details. Softride(R) Technology leaf springs have tapered leafs to distribute loads more evenly and to create more flex at the leaf ends. Teflon(R) wear pads between leafs and bolt style spring clips prevent binding and eliminate friction. Paired with ADX 2.0 Adventure Series Remote Reservoir Aluminum Monotube Shocks for optimal damping control. ADX 2.0 has a race-inspired full-displaced valving system. Nitrogen charged with Internal Floating Piston Technology = Quickest Shock Reaction Time Ever. Together this complete kit maintains the factory geometry angles, alignment specifications and structural strength. Reap the benefits: On-Road Refinement and Off-Road Readiness.