SPL Parts 13-16 Porsche Boxster / 13-16 Porsche Cayman (Excl. GT4/GT4RS) Rear Lower Control Arm KitThe SPL Rear Lower Control Arm Kit (RLCAK) significantly improves rear mechanical grip, provides greater stability under hard braking and acceleration, and precise feedback on what the rear is doing on turn in and on limit. The use of PTFE lined, F1 fit FK USA spherical bushings eliminates OEM rubber bushing deflection and bind, allowing the suspension to freely articulate without undampened rubber spring forces, while also preventing camber loss,