AEV 4.5in High Capacity Coil Springs
are a direct fit upgrade for customers with an AEV 4.5in DualSport SC Suspension System
). Designed with the overlander in mind, these frequency-tuned, progressive-rate coil springs provide the increased load-carrying capacity necessary for heavily loaded vehicles while offering exceptional ride quality, handling, and off-road articulation.
These coil springs are only available as a matching set of front and rear springs to preserve optimal vehicle handling dynamics. The relative rate/frequency of the front coil springs vs. the rear springs is a crucial part of safe vehicle handling. Because of this, AEV increases the rate/frequency of the front springs to maintain an appropriate relationship with the rear springs across the entire range of rear-biased loading.
These coil springs are designed specifically for heavily loaded vehicles; exceeding GVWR (Gross Vehicle Weight Rating) and RGAWR (Rear Gross Axle Weight Rating) will cause changes in the vehicle’s braking, steering, and overall handling performance.
These springs are NOT designed as a means to additional lift height on unloaded vehicles. Installing these springs on an unloaded JK Wrangler will make the front end sit about 3/4in higher than the standard 4.5in spring, and the rear end will sit about 1in taller than the front.
Due to the inherent nature of a heavy-duty coil spring, vehicles equipped with AEV High Capacity Coil Springs will experience a substantially stiffer ride quality if the vehicle is driven unloaded. However, ride quality will improve considerably as more weight is added to the vehicle. This is something that should be considered before purchasing these coil springs.