This conversion kit is intended for customers who already have the BDS 4" or AEV 4" lift on their air suspension truck. This kit will allow you to convert the air suspension to coil springs using Bilstein shocks while keeping the 4" BDS lift. Fits 2013 - 2018 Ram 1500 4x4 (including Rebel) with BDS or AEV 4" air suspension lift. Includes:Bilstein front strutsFront coil springsFront upper strut mountsRear coil springsBilstein rear shocksRear isolatorsRear bump stops Optional:Front coil spring covers (Recommended for off road or gravel use!) Rear shock selection - For customers who tow and haul, we recommend choosing the firmer rear shock option as this has better ability to dampen the extra weight. The softer ride rear shock is adequate for normal empty driving, but can be too soft when extra weight is added. Fits:2013 Ram 15002014 Ram 15002015 Ram 15002016 Ram 15002017 Ram 15002018 Ram 15002019 Ram 1500 Classic (5 bolt wheel only)2020 Ram 1500 Classic (5 bolt wheel only) Fits all trim levels including Rebel, Laramie, Longhorn and Limited. Note - All of our kits include the use of a programming tool which allows you to remove the "Immediate Air Suspension Service/Repair Required" message from the dashboard. We don't use cheap and unreliable relays like our competitors. Our programming tool is designed to modify the calibration of the BCM so that the truck thinks it never came with air suspension from the factory. This is a permanent solution. If you'd like to get a programming tool with your kit, please select "Yes, I'd like to borrow a programming tool on the option above". This is a refundable charge which will allow us to include the programming tool with your order. We really try hard to keep costs down for our customers, so these are supplied on a deposit "rental" basis. When you're done installing your kit and the programming is done, mail us back the programmer and we will happily refund you the deposit.