Hotchkis Sport Suspension 1203AA 1964-1967 GM A-Body DBL Adjustable Upper Trailing Arms. Improve the traction and handling of your GM 64-67 GM A-Body Muscle Cars with the Hotchkis Double Adjustable Upper Trailing Arms. These exceptionally durable control arms allow for easy pinion angle adjustment for reduced vibration and increased traction. Our exclusive Swivel-Max bushings offer non-binding articulation during suspension travel which improves traction and rear suspension efficiency. Finished in gloss black powder coat and clear anodizing these Double Adjustable Trailing Arms look great and perform well. This item is a must for any high horsepower Chevelle GTO El Camino or other A-Body models. Features: Double adjustable design with right and left hand threads. Lightweight strong 1-1/2 in. billet aluminum center sections with color Hotchkis logo. Hotchkis exclusive high articulation easy to lubricate Swivel-Max bushing. 100% TIG-welded heavy duty steel construction. Durable black powder coat finish. Benefits: Easy in-car pinion angle adjustments for improved traction and reduced wheel hop. Heavy duty construction for long lasting durability on the street or track. Swivel-Max bushings allow for suspension articulation without unwanted longitudinal flex. Complete ready to bolt-in and includes polyurethane rear end housing bushings. For easy bushing installation we also recommend our GM Upper Trailing Arm Bushing Installation and Removal Tool. Hotchkis Sport Suspension 1203AA 1964-1967 GM A-Body DBL Adjustable Upper Trailing Arms. Designed allow for easy pinion angle adjustment to improve the traction and handling of your GM 64-67 GM A-Body Muscle Car. 1964-1967 Chevelle, El Camino, Malibu, GTO, 442, Monte Carlo, Tempest, Skylark, Lemans, Cutlass 1964-1967 Chevelle El Camino Malibu GTO 442 Monte Carlo Tempest Skylark Lemans Cutlass