SPL Parts Front Lower Control Arms F8X M2/M2/M4SPL Parts Front Lower Control Arms (FLCA) provide roll center, camber, and track width adjustment for the F8X BMW M2 M3 M4, and allow for full articulation with the proper ball joint angle. The main arm is slotted to allow the use of pinch bolts, and our rotating clamps on SPL Parts' exclusive Double Adjuster lock down camber and track width settings. No more jam nuts!! Long gone are the days of fumbling with multiple wrenches to tighten jam nuts in