Description
SPL Parts 2014+ BMW M2/M3/M4 (F8X) Rear Upper Control Arms is a chassis-specific suspension upgrade engineered for drivers who want more precise geometry control from 2014+ BMW M2/M3/M4 (F8X). SPL Parts is a U.S.-based performance-suspension specialist that develops motorsport-oriented chassis hardware for precise alignment, low compliance, and repeatable setup changes.
This upper suspension link replaces the factory arm with a more precise component intended to improve wheel-location control and, where adjustable, expand the usable alignment range. By reducing unwanted bushing movement, the upright follows the commanded geometry more closely under lateral load, helping preserve camber and toe behavior through fast transitions and sustained cornering.
Why it matters: On this application, the goal is to keep the tire and upright closer to the intended alignment as loads rise, giving the driver a more repeatable platform for braking, turn-in, mid-corner balance, and power application. The additional setup range is useful for lowered cars and wider tire packages that need alignment targets outside the factory adjustment window.
When combined with quality dampers and tires, precise suspension links help make chassis tuning changes easier to feel, measure, and reproduce.