Hotchkis Sport Suspension 1201 1978 - 1988 AG Body Upper Trailing Arm. Hotchkis Performance upper trailing arms for your 78 - 88 AG Body improve traction reduce wheel hop and improve handling and stability. Designed as direct replacements for weak stock trailing arms Hotchkis trailing arms feature TIG - welded construction from one piece of parent material quiet operating greasable polyurethane bushings and a powder coated finish. Black Powder coat. For easy bushing installation we also recommend our GM Upper Trailing Arm Bushing Installation and Removal Tool.