Hotchkis Sport Suspension 1823 2011- 2012 Mustang Rear Suspension Package. The Hotchkis Sport Suspension Rear Suspension package for the 2011-2012 Mustang is designed to improve all the key components in the rear suspension improving traction and reducing wheel hop. The package includes adjustable Upper Trailing Arm Lower Trailing Arms and a adjustable Panhard Rod. The adjustable upper trailing arm design makes pinion angle changes a breeze while the high articulation 7/8 in. heim joints allow for adequate suspension twist for maximum articulation and minimal suspension bind up. The hi-tech lower trailing arms featuring TIG welded I-Beam construction for maximum strength to weight ratio with greasable swivel max polyurethane bushings to increase suspension articulation while maintaining a quiet comfortable design. The adjustable panhard rod is designed to allow adjustment for changes to ride height and improves cornering traction by reducing suspension flex. The rear suspension kit is finished in gloss black powder coat for durability and is a direct bolt in installation that can be done in minutes. The Hotchkis Rear Suspension Package is a must have finishing touch for any high performance 2011-2012 Mustang.