SuperPro TRC6645 Fixed Offset Upper Control Arms with Heavy-Duty High-Articulation Ball Joints and Polyurethane Bushings (2 to 4 inch Lift) Enhance alignment, handling, and durability on your lifted 4x4 with the SuperPro TRC6645 fixed offset upper control arms. Built for 2 to 4 inch lifts, TRC6645 combines high-strength steel, a high-articulation ball joint, and SuperPro polyurethane bushings for confident off-road performance. Features and Benefits Corrects wheel alignment on lifted 4x4 vehicles to reduce tire wear and improve overall performance. Heavy-duty, high-articulation ball joint increases suspension articulation without binding for better control and handling over rough terrain. High-strength steel forgings and tube steel construction; robot-welded for consistent, precise quality and heavy-duty durability. Includes SuperPro polyurethane bushings offering superior resilience and durability compared to traditional rubber. Polyurethane is resistant to abrasion, wear, and chemicals — ideal for harsh off-road environments. Fixed offset UCA delivers extra clearance and articulation; designed to solve alignment issues when you lift your 4WD. Manufactured, tested, and designed in Australia. High quality welding and assembly using high grade steel for increased strength. Approved Nationally — VSB 14 Compliant (ADR compliant). SKU TRC6645 — suitable for 2 to 4 inch lifted vehicles.