CE-9900JKR4 – JK 4D Antirock Rear Sway Bar Kit (forged arms, 1 in. bar)

Improve off-road performance and suspension articulation with the RockJock Antirock Rear Sway Bar Kit for Jeep JK Wrangler Unlimited 4-door models. Designed to increase traction and stability on challenging terrain, this rear sway bar upgrade allows your suspension to flex more freely, helping all four tires maintain better contact with the ground for improved control and performance off-road. The RockJock Antirock Rear Sway Bar is a direct bolt-on replacement for the factory rear sway bar and installs easily using basic hand tools. Engineered for convenience and durability, this system does not require sway bar disconnects, allowing you to drive on-road and off-road without making adjustments. Constructed from high-strength 4340 heat-treated chromoly steel, the Antirock sway bar delivers exceptional durability and long-lasting performance. This premium material is the same specification used in professional off-road racing sway bars, ensuring maximum strength under extreme conditions. When paired with a RockJock Front Antirock Sway Bar, the rear Antirock system provides a balanced suspension setup that improves front-to-rear handling and overall vehicle stability. By distributing weight and traction more evenly across all four tires, the system enhances articulation, increases off-road grip, and delivers a more controlled and predictable driving experience in rugged terrain. Ideal for serious off-road enthusiasts, the RockJock Antirock Rear Sway Bar Kit is a proven suspension upgrade for Jeep JK Wrangler Unlimited owners seeking improved articulation, better traction, and dependable performance without the need for disconnecting sway bars. Kit Fits: JK Wrangler Unlimited (4-door) – All Models Kit Includes: 1 in. diameter 4340 heat treated chromoly sway bar Fabricated steel frame brackets Forged chromoly sway bar arms Adjustable sway bar links w/ sealed ends UHMW sway bar bushings Stainless braided extended brake line kit All required hardware Notes: Body Roll – Antirock sway bar equipped vehicles will exhibit more body roll than vehicles equipped with the stock sway bar. Antirock sway bars may be used on the street, however, they do not provide the same handling characteristics as the stock sway bar. End Links – Out of the box, the length of the sway bar’s vertical links that are included in this kit are intended for use with our suspension systems (4 in. lift). Depending upon your specific vehicle’s lift, you may obtain shorter or longer links to suit, here. Additionally, all of the link rods may also be trimmed in length for fine tuning purposes. Fitment – It is quite common for factory frames to vary in width. If you find your vehicle’s frame to be on the narrower side, the Antirock arms can simply be slid on until they are snug against the Antirock bushings and then the arms clamped down. However, on some frames the arms absolutely have to hold true width to clear bolt heads on the side of the frame, etc. In instances of this nature, see our CE-9901D-SP4 shim pack to assist in fine tuning. Wheel and Tire Clearance – If stock JK wheels are being retained, a 1.5 in. wheel spacer is required for proper tire clearance of the Antirock sway bar end links. Aftermarket wheels should have a minimum of a 4.5 inch back spacing for proper tire clearance of the Antirock sway bar end links.