Made from 6061-T6 aluminum on a DMG Mori 5-Axis CNC, these 991 outer lower control arms are engineered for both precision and performance. 0-6mm shims help correct caster as necessary – which is especially useful on cars equipped with aftermarket suspension. Aurora spherical bearings and anti-corrosion treated studs complete the outer arm and guarantee consistent top-tier performance over an impressively long life span. For extra durability, each arm is hard coated finished which ensures they will preserve their exceptional look regardless of how many paces you put them through.