These kits are made from Billet Aluminum ends, Stainless Steel threaded centers & durable 2 stage rubber grommet ball stud clips. They are FULLY ADJUSTABLE so you can set your vehicle to sit exactly how you like. The Kits take between 30 minutes and 1 hour to install. The vehicle can be returned back to stock just as quick without any detection of being modified. All four air ride corners are included so fine adjustments to any vehicle lean issues can also be taken care of very quickly.