AEV 3″ High Capacity Coil Springs are a direct fit upgrade for 4-Door JL Wrangler customers with an AEV 2.5″ DualSport Suspension System already installed on their vehicle. Developed with the true overland enthusiast in mind, these frequency-tuned, progressive rate coil springs provide the increased load carrying capacity necessary for heavily loaded vehicles, while still offering the exceptional ride quality, handling and off-road articulation that AEV is known for.Standard Load Coil Springs are optimized for an AEV-spec Wrangler with typical gear/cargo inside. This means the ideal ride height, handling and overall performance will be achieved on a vehicle with steel bumpers, winch, full-size spare and recovery gear (+0-400 lbs. over factory weight).High Capacity Coil Springs are specifically designed for overland enthusiasts who have a fully outfitted vehicle that is also consistently loaded with heavier gear (+400-600 lbs.), such as modular cargo systems or roof rack/rooftop tent combinations.While these coil springs will work for a lighter weight vehicle, customers should be aware that it will sit higher than advertised and have a slightly stiffer ride – not excessively harsh or intolerable, but also not nearly as pleasant for daily use as a vehicle within our target weight range.AEV High Capacity coil springs are engine specific and only sold as a complete set of front/rear springs in order to preserve the optimal vehicle handling dynamics that our DualSport suspensions provide.