Low Friction B/J Upper Screw-In + 1-1/2in

The Low Friction Ball Joint Upper Screw-In + 1-1/2in by ALLSTAR PERFORMANCE is a precision suspension component engineered for serious street and competition builds where chassis geometry demands accuracy and repeatability. As a mechanic who regularly specifications front-end suspensions, this screw-in upper ball joint eliminates binding and reduces friction across the full range of motion—critical for maintaining consistent steering response and wheel alignment under load. The 1-1/2-inch dimension accommodates specific control arm configurations common in road racing, bracket racing, and high-performance street applications where OEM ball joints fall short of durability and performance standards.

Built with low-friction bearing surfaces, this screw-in ball joint minimizes stiction—the difference between static and dynamic friction that degrades handling precision. The threaded design allows bolt-in installation into existing control arm cavities without extensive modification, simplifying installation for fabricators working within time and budget constraints. Premium material composition and tight tolerances ensure the joint maintains its integrity through repeated compression cycles, cornering loads, and suspension articulation that would wear conventional units prematurely. At 1.75 lbs, the component delivers negligible unsprung weight penalty while providing the stiffness and consistency that translates road feel back through the steering wheel.

This upper ball joint suits vintage and modern suspension builds requiring custom geometry setup—particularly single-digit tire-slip independent front ends on dedicated track cars and restomod platforms. Corner-weight-sensitive competitors benefit most from the friction reduction, as it improves weight transfer consistency and predictability during transitions. Installation requires verification of control arm bore diameter and thread pitch compatibility; verify your application supports the 1-1/2-inch screw-in format before ordering to ensure proper fit and safe operation.