Fits 3.0L Diesel / 392 4-Door JL Wranglers Exceeding GVWR (Gross Vehicle Weight Rating) and/or RGAWR (Rear Gross Axle Weight Rating) will cause changes in the vehicle’s braking, steering and overall handling performance. Please note: AEV High Capacity Coil Springs are NOT compatible with 2-Door Wrangler models. 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. AEV 3″ High Capacity Coil Springs 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. High Capacity Coil Springs are 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. . 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.