Factory camber adjustment on the BMW E46 uses an eccentric bolt, which permits about 1 degree of adjustment. That’s not enough for the lowered ride heights required for racing.
ECS Tuning offers adjustable rear control arms that combine user-friendly adjustment, robust construction, and good looks that are a solid improvement over stock stamped-steel arms. Manufactured from strong, yet lightweight 6061-T6 aluminum and featuring a 303 stainless steel turnbuckle, the ECS Performance Adjustable Rear Control Arm uses a serviceable OEM-style bushing for long life and inexpensive service. These arms offer more than 8 degrees (approximately plus 2 to minus 6 at stock ride height) of adjustment from a center-located turnbuckle, fast, precise camber adjustments are easily accessed with no subframe interference. Engineered and manufactured in the U.S.A. $308.41. Remember NASA members get 10 percent off at ECS Tuning.