SPL Parts Front Lower Control Arms BMW 3 Series E9X (M and non-M), BMW 1 Series E8X (M and non-M)Dial in the suspension of any BMW 3 Series E9X with SPL Parts Front Lower Control Arms. This lower control arm kit provides roll center, camber, and track width adjustment for the E9X and E8X BMWs, and allows for full articulation with the proper ball joint angle. The main arm is slotted to allow the use of pinch bolts, and rotating clamps on SPL Parts' exclusive Double Adjuster lock down camber and track width settings. SPL Parts' Double Adjuster is