Whiteline caster shim kits are designed to improve cornering grip and vehicle straight line stability through increased static caster and dynamic negative camber gain.Whiteline Control arm lower inner front bolts.Protective plating on all metal components acts as a hard skin that is much tougher than conventional paint allowing this product to withstand the toughest conditions and resist corrosion for years to come.Engineered to alter/ optimise caster alignment to maximize tyre contact patch during roll, improve turn-in response & increase directional stability.Install guide included providing detailed instructions on how to install your new Whiteline purchase.