By introducing coilover shock technology to other aftermarket JK suspension platforms, the Poly Performance Jeep JK Coilover Conversion Kit allows for long travel 2.0″ Diameter Coilovers/Non-Coilovers and 2.0-2.5″ Air Shocks from 12″ to 14″ (up to 16″) travel for improving off-road driving performance and increasing wheel travel. The JK Coilover Conversion Kit also allows for easy ride height adjustments, spring rate adjustments, and compression/rebound damping adjustments. At each front corner the optional Front Air Bump Kit introduces race proven 2.0″ hydraulic bumpstops as secondary suspension, to improve off-road comfort & durability. All mounting components are engineered to be compatible with common body lifts, engine lifts, on-board air systems, and most suspension systems. The JK Coilover Conversion Kit is supplied as one complete system or 2 individual sections (Front Kit and/or Front Air Bump Kit).