Eibach 4.12535.880 Suspension Sport-Plus Kit for Ford Mustang 3.7L V6 SPORTLINE + ANTI-ROLL-KIT = PRO-PLUS Performance Springs and Sway Bars = Superior Handling for the Serious Enthusiast Stop Quicker, Corner Faster and Better MPG! Simple Bolt-On, No Modifications: Install, Set the Alignment and Carve