07-18 Wrangler JK, 4-Door;Heavy-duty axle truss;Chromoly centerlink;Differential support ring;High quality hardware included;Compatible with Rubicon Express Extreme Duty Long Arm Systems;California Residents: WARNING Rubicon Express is proud to announce the release of the new 3-link rear suspension upgrade for Jeep JKs. This new system delivers unmatched articulation and control for the JK platform making it perfect for the hardcore rock crawler. With improved suspension geometry, this 3-link provides better traction, while eliminating rear steer and bushing bind. This system features a robust CNC laser cut axle truss, an adjustable Chromoly center link, a differential support ring and high quality hardware. The system is easy to install and adjust for maximum performance. It is designed as a bolt on for Dana 44 housings. It can be ordered as an upgrade kit for vehicles equipped with a 3.5 inch and 4.5 inch Rubicon Express Extreme Duty Long Arm Suspension. Like all Rubicon Express products, this system is made in the USA and backed by the Rubicon Express Advantage Lifetime Warranty.