Adj. Upper Trailing Arms - 64-67 GM A-Body

The QA1 Adjustable Upper Trailing Arms for 64-67 GM A-Body vehicles are engineered for serious suspension geometry tuning on classic Chevelle, Malibu, and Skylark platforms. These arms allow you to dial in rear axle angle and pinion geometry with precision, giving you the control needed for both street and strip applications. Whether you're building a restomod or chasing consistent quarter-mile times, adjustable trailing arms are essential for eliminating wheel hop, controlling squat, and optimizing traction under load.

QA1's design uses high-strength steel construction with adjustable rod ends that permit fine-tuning of rear axle alignment without cutting and welding factory components. The adjustable mounting points control pinion angle independently from ride height, allowing compensation for engine torque and suspension travel dynamics. Proper adjustment reduces bind, minimizes driveline stress, and maintains consistent contact patch geometry through compression and extension.

These upper trailing arms are sold as a pair, making them suitable for any builder stepping beyond bolt-on suspension upgrades. Performance enthusiasts, drag racers, and street rodders will benefit most from the adjustment capability. Installation requires removal of factory trailing arms and utilizes existing or reinforced mounting points on the GM A-Body frame and rear axle housing.