RJ-236200-101 – JK Antirock (Heavy Load) Rear Sway Bar Kit (forged arms, 1 1/8 in. bar)

Built for overlanders, racers, and heavily loaded trail rigs, the RockJock Heavy Rear Antirock Sway Bar Kit for Jeep JK Wrangler and Wrangler Unlimited models features a massive 1-1/8-inch diameter, 28-spline torsion bar designed to provide increased rear roll stiffness and improved stability. Whether you’re carrying roof top tents, overland gear, bed racks, spare fuel, or additional camping equipment, this heavy-duty rear sway bar delivers the added support needed to maintain control and confidence both on and off the trail. Ideal for overland builds and high-speed desert racing applications, the Heavy Rear Antirock Sway Bar Kit directly replaces the factory rear sway bar and installs easily using basic hand tools. No cutting or modifications are required, making it a simple bolt-on suspension upgrade for 2007-2018 Jeep JK Wrangler and JKU Wrangler Unlimited models. At the core of the system is a premium 4340 heat-treated chromoly sway bar, manufactured to the same standards used in professional off-road competition vehicles. The increased spring rate of the larger 1-1/8-inch torsion bar helps control body roll and maintain vehicle stability when carrying extra weight or navigating rough terrain. When paired with a RockJock Front Antirock Sway Bar, the Heavy Rear Antirock system provides balanced suspension performance and a more stable, predictable driving experience. By distributing weight and traction more evenly across all four tires, the Antirock system improves articulation, enhances off-road traction, and helps maintain control in rugged conditions. The result is increased stability, better suspension balance, and improved confidence whether you’re exploring remote trails, tackling technical obstacles, or racing across the desert. Designed for serious overland and off-road enthusiasts, the RockJock Heavy Rear Antirock Sway Bar Kit is one of the most effective suspension upgrades available for Jeep JK Wrangler owners seeking improved load handling, balanced articulation, and superior off-road performance. Kit Fits: JK Wrangler Unlimited (4-door) – All Models JK Wrangler (2-door) – All Models Kit Includes: 1 1/8 in. diameter 4340 heat treated chromoly sway bar Fabricated steel frame brackets Forged chromoly sway bar arms Adjustable sway bar end links w/ sealed ends UHMW sway bar bushings Stainless braided extended brake line kit All required hardware Notes: Body Roll – Being that this kit features our heavy torsion bar, if this kit is used in unloaded vehicles, you may find the rear sway bar to be stiffer than you would prefer. This kit is intended for use on vehicles that are loaded down with a rack, roof top tent, camping gear, etc. If this does not sound like your application, you may be more of a customer for our standard 2-door kit, or our 4-door kit. 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 RJ-207001-1SP4 shim pack to assist in fine tuning. Wheel & 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.