CONTENTS(2x) 6061-T6 Billet Aluminum Front Strut Spacers(2x) Chromoly Uni-Ball Upper Control ArmsInstallation HardwareInstallation InstructionsSupreme Suspensions Pro PackManufactured from lightweight 4130 Chromoly Steel, this set of upper control arms is engineered to optimize front axle alignment and prevent unwanted vibrations on your lifted Toyota. This tubular control arm kit is equipped with zerk fittings to easily grease the included Polyurethane Bushings and Teflon-coated FK 1.25? PTFE-Lined Uni-Ball Bearings to replace the weak factory ball-joint, offering unparalleled strength for heavy-duty or off-road use.Our Pro-Billet Series Strut Spacer Lift Lits are precision engineered from 6061-T6 billet aluminum, then anodized for a superior finish. Billet aluminum is a great material for use in suspension applications as it has an immensely high strength to weight ratio along with a superior level of corrosion resistance compared to many other metals on the market. Unlike steel kits that are cut-out and welded together, our Pro-Billet kits are machined from a solid piece and will not bend or warp under even the most stressful conditions.Supreme Suspensions products are developed and rigorously tested by in-house ASE certified specialists, dealerships, and professional racers across the United States. Installation is usually completed within 3 to 5 hours without the need for special tools. We recommend an alignment after installation.NOTES: Please note that spacer thickness to lift height is NOT a 1:1 ratio. Strut spacer installation alters the angle of the lower control arm, and this accounts for an additional lift beyond the actual thickness of the spacers. An alignment is always recommended after altering the height of your vehicle.