SPL Parts Adjustable Front Lower Control Arm Set - 2016-2019 Cadillac ATS (Alpha)Front Lower Control Arms (FLCA) for the 2016 2019 Cadillac ATS (Alpha) provide roll center, camber, and track width adjustment 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