D2 Racing RS Coilover Kits provide the ultimate in suspension technology. The setup has seperate height and preload adjustments allowing for optimal adjustment and allowing full strut travel at all times along with pillowball upper mounts or top mounts*. Mounts are constructed of 6061 powder coated aluminum. Threads are teflon coated to prevent rust. Rebuildable and serviceable in the US. The RS Coilover kit has been designed with professional road racing in mind offering extremely high value and performance.