ICON engineers have also developed optional "Performance Systems" that include multi-rate rear coil springs in place of the rear spacer. The lighter initial droop rate of these performance rear coil springs helps the truck feel smoother and more controlled over washboard roads, small whoops, or similar terrain. The secondary ride rate allows the truck to maintain exceptional ride quality, while the aggressive third overload rate helps prevent bottom outs and provides payload support. These systems were developed with the chase truck type of application in mind, and will significantly increase the on and off-road performance of the RAM 2500 when driven aggressively.Installation InstructionsThis Part Fits: Year Make Model Submodel 2014-2018 Ram 2500 Big Horn 2014-2018 Ram 2500 Laramie 2014-2015 Ram 2500 Laramie Limited 2014-2018 Ram 2500 Laramie Longhorn 2016-2018 Ram 2500 Limited 2014-2015 Ram 2500 Lone Star 2014-2016 Ram 2500 Outdoorsman 2014-2018 Ram 2500 Power Wagon 2014-2018 Ram 2500 SLT 2014-2018 Ram 2500 Tradesman
