This is an improvement to the Jeep 1990-2017 Delete System to improve return-to-center consistency. This replaces the crush shim with a short bushing to put direct pressure through the spherical and uses a Delrin shim instead of steel to decrease rotational drag. These will come standard with every new Delete System, (Jeep 1990-2017) and are being offered to those already running them. The cost is for shipping only, we are covering the production cost for you!