Accessories:C-Hubs-2pcsStainless Steel Cap Head Screw 2.5x16-8pcsOriginal Name / Part No:LOS244003Part location:Front c-hubsDoes this product replace a specific part or function?yesProduct major function & usage:Stabilize knuckle arms in order to rotate smoothly.Major advantages of upgrading to this product:1. Made with a quality light weight high tensile strength aluminum 6061 T6 for greater durability.2. Delrin collars are inserted to minimize the gap and friction so that the steering performance is top rated.