UMI Performance 501518-B Tubular Rear Control Arm Kit GM H-Body 1971-1975

The UMI Performance 501518-B is a complete tubular rear control arm kit designed as a direct bolt-on replacement for 1971–1975 GM H-Body vehicles.

Whether your H-Body is a weekend cruiser or a dedicated track car, this kit delivers measurable improvements in traction, cornering response, and overall handling consistency. Stock control arms use soft, deflecting bushings in weak stamped steel — this kit replaces all of that with precision-built DOM steel tubing and high-performance bushings.

Key Features:

• Includes tubular rear lower and upper control arms — complete kit
• Fabricated from 1.250" DOM steel tubing for maximum strength and durability
• CNC machined for precise, accurate tolerances
• TIG welded construction for superior weld integrity
• Fluted, greaseable Energy Suspension bushings for long-lasting, squeak-free performance
• Direct bolt-on fitment — no cutting or modification required
• Minimizes wheel hop and reduces bushing deflection
• Improves cornering and track consistency
• Finish: Black (as indicated by the "-B" suffix in the part number)

Important Note: The 1975 Vega Cosworth and certain other H-Body vehicles built in 1975 utilized a panhard bar/torque arm rear suspension setup rather than upper control arms. If your vehicle is a 1975 model, please verify that it is equipped with rear upper control arms before ordering this kit.

UMI Performance parts are manufactured in the USA and built to exceed OEM standards in both strength and performance. This kit is an ideal upgrade for Chevy Vega, Pontiac Astre, and other GM H-Body platform vehicles looking to maximize their suspension geometry and handling potential.