Upgrade the front suspension of your 1978-1988 GM G-Body with the QA1 QAP52564 Pro-Touring Lower Control Arm Kit. Designed for autocross, road course, and performance street driving, this kit includes lower control arms, QA1 Ultra Low Friction Ball Joints, and low-friction bushings to improve handling, reduce suspension bind, and maintain consistent tire contact through corners. The control arms are configured for QA1 Pro Coil Systems with double-shear lower mounting and are engineered as a direct bolt-in solution for easier installation.
QA1 QAP52564 control arms use high-strength tubing and billet aluminum cross shafts to deliver an optimized strength-to-weight ratio with improved durability. The included ball joints feature a one-inch-longer upper ball joint stud to improve camber gain, helping the tire maintain a more effective contact patch during cornering. QA1 ball joints are also adjustable and rebuildable, allowing suspension tuning with different stud lengths as needed. When used with compatible QA1 upper control arms, the system is designed to add approximately 3 to 4 degrees of caster and 0.5 to 1 degree of negative camber; using the components independently provides approximately half those changes.
Each control arm is robotically welded and finished with a high-quality powder coating for lasting protection and a clean appearance. The QA1 Pro-Touring Lower Control Arm Kit is made in the USA and is engineered to correct outdated front suspension geometry while providing bind-free movement and reliable performance. It fits select GM G-Body applications, including the Pontiac Grand Prix and Pontiac Bonneville. Verify vehicle application and suspension configuration before installation. Professional installation and alignment are recommended for optimal results.
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