This Kit Features: 100% bolt-on performance. Increased wheel travel Large 2.5” shock bodies increase fluid capacity for smoother, cooler running shocks. Factory tuned for optimal ride quality. Extensive dynamometer lab testing and punishing real world testing to develop optimal damping curves for your Chevy/GMC. Built from the same quality materials and to the same precise tolerances as King’s top of the line Pure Race series shocks. Fully rebuildable, serviceable and tunable. Finned Reservoir with Optional Compression Adjuster: External finned reservoirs dramatically increase fluid capacity, heat dissipation and provide sustained damping performance even under the most punishing conditions. All new threaded end cap design with new Schrader valve protective cap. Made from extruded 6061-T6 aluminum. New improved reservoir mounts. No more hose clamps! Optional 2.5 Wide Range Compression Adjuster that allows for precise compression damping adjustment to further refine your ride quality. This kit only fits "Ultra-Wide Stance" vehicles. Does not fit Chevy Colorado WT, LT, Z71, ZR2 or GMC Canyon AT4X.