Trailing Arm Upper Rear GM B-Body 65-67

The QA1 Trailing Arm Upper Rear for GM B-Body 1965–67 is a tubular suspension component engineered to restore or enhance rear-axle locating geometry in classic muscle car and hot rod applications. This upper trailing arm kit uses adjustable polyurethane bushings and greaseable connection points, allowing technicians to dial in suspension compliance and control while maintaining the structural integrity required for street and strip duty. The red anodized aluminum construction resists corrosion while keeping rotational mass low—a critical consideration in vehicles where unsprung weight directly affects handling response and tire contact.

QA1 trailing arms are purpose-built for chassis builders, restoration specialists, and performance enthusiasts working with B-Body platforms. The adjustability inherent in the bushing design permits fine-tuning of rear-axle housing location and wrap-up characteristics—essential when upgrading to modern shock absorbers, wider tires, or higher-output powerplants. Greaseable bushings extend service intervals compared to sealed alternatives, reducing maintenance costs over the vehicle's operational life. At 7.42 lbs per arm, the weight penalty is minimal, and the aluminum construction avoids the fatigue concerns associated with heavier steel fabrications in high-cycle racing environments.

This kit is specified for 1965–1967 GM B-Body vehicles, including Chevrolet Chevelle, Pontiac GTO, Oldsmobile 442, and Buick GSX platforms. Restoration shops frequently source QA1 trailing arms when converting vintage suspensions to independent rear geometry or upgrading factory locating members to handle engine modifications, wider rear axles, or increased lateral loads. The adjustable design accommodates variations in frame geometry and allows builders to optimize roll center location—a factor that directly influences cornering stability and brake dive characteristics during aggressive driving.