Eibach ANTI-ROLL-KIT (Both Front and Rear Sway Bars) 4040.320 Performance Tuned Handling Further Reduce Body Roll Precision Engineered for PRO-KIT & SPORTLINE Performance Lowering Spring Kits Part of the Eibach PRO-PLUS, PRO-SYSTEM-PLUS, SPORT-PLUS & SPORT-SYSTEM-PLUS