SuperPro Fixed Offset Upper Control Arms for 1–3 Inch Lifted Vehicles with High-Articulation Ball Joints and Polyurethane Bushings – TRC6590 Boost alignment and articulation on lifted 4x4s with the SuperPro TRC6590 fixed offset upper control arms, engineered for durability and control. TRC6590 combines heavy-duty construction with polyurethane bushings for reliable off-road performance. Features and Benefits Fixed offset UCA improves wheel alignment on 1–3 inch lifted 4x4 vehicles for reduced tire wear and better performance. Heavy-duty, high-articulation ball joints allow greater suspension movement without binding for improved handling over rough terrain. Constructed from high-strength steel forgings and tube steel; robot-welded for consistent, precise quality. Includes SuperPro polyurethane bushings offering superior resilience and durability compared to traditional rubber. Polyurethane bushings resist abrasion, wear, and chemicals—ideal for harsh off-road environments. Enhances your 4WD's handling and performance; designed to solve alignment issues when you lift your 4WD. High-quality welding and assembly; high-grade steel for increased strength. Approved Nationally - VSB 14 Compliant (ADR compliant). Pairs with TRC6680 to form a kit; SKU TRC6590.