Our CNC machined control arm brackets are made from solid steel and are fitted with a self lubricating solid bushing made from UHMW. Designed for the street or the track, they hold the control arm steady and eliminate "shimmy" caused by stock bushings. They sharpen steering and improve overall driving feel. Comparable to the NLA Treehouse E36 & E30 Eyeball Arms. Easiest install of any aftermarket solution Allow clearance for E30 M50 Conversion exhaust Street Approved, marginal increase in NVH Easy Installation, no need for a press CNC machined steel construction Solid design without the maintenance of spherical bearings Heavy-Duty replaceable UHMW insert. Don't be mis-informed, UHMW is the bestmaterial for these inserts. Delrin is not self lubricating, and will crack and degrade overtime. Powder coated white for corrosion resistance Improve caster with M3 offset geometry Keep proper steering geometry under high loads Made in the U.S.A. Replacements for your old Treehouse units availablehere. **Lifetime WarrantyFitment:E30 84-91 3 Series, E36 92-98 3 series & Z3Choose centered or offset in the drop down. Learn More:https://youtu.be/uJFsLtV7zX4