2014-2018 Ram HD 4WD Rear 1" Coil Spacer Kit (66-1211)The ReadyLIFT 1. 0 inch Rear Coil Spring Spacer Kit is a heavy duty steel rear suspension component designed to provide an additional 1 inch of lift to the rear of Ram 2500 and 3500 4WD trucks equipped with rear coil springs. This solution is ideal for trucks that require a small amount of extra rear lift for towing or hauling, helping to maintain a level stance under load. The spring spacers install directly onto the factory rear coil springs and use