The TeraFlex Forged Dual Rate S/T Swaybar System is the most advanced manual swaybar disconnect systems available. With its easy engagement knob you can go from street to trail in seconds - literally! The Dual Rate S/T Swaybar System gives you the best of both worlds. Engaged in the G_4streetG_ position, the bar delivers a safe, more stable highway drive. Disconnected in the G_4trailG_ position, it allows your vehicle to articulate and your tires to bite despite the terrain with balanced suspension travel. The Dual Rate features two torsion bars, one for heavy duty highway handling and one tuned for off-road articulation. The "Trail" setting offers some resistance but just enough to limit excessive body roll when maneuvering off camber and side hill situations. It also helps to maintain and keep the vehicleG_s center of gravity constant by keeping the vehicle weight distributed evenly. The torsion bars are made from high grade 4130 alloy steel. The new FORGED arms add to the strength while reducing the overall weight. There is virtually no limit in articulation when running the Dual Rate S/T. Engaging and Disengaging are as simple as the twist of a knob. Fits all JK Wrangler models including the Rubicon and Unlimited with suspension lifts of 4" or more.