The RockJock Universal AntiRock Sway Bar Kit with Steel Arms from RockJock Off Road is a rugged, proven solution for custom rigs, rock buggies, and fabricated suspensions where durability and predictable off-road control are the priority.

AntiRock sway bars are engineered to keep the front and rear suspension working together in uneven terrain, improving traction and stability with no disconnects required. This is a true fabricator style universal kit that includes everything needed for installation except the welder.

This kit features a 36-inch, .770-inch diameter heat-treated chromoly torsion bar, paired with fabricated steel sway bar arms available in 17 in., 18 in., 20 in., or bent 20 in. lengths. Adjustable end links, Delrin bushings, weld on axle tabs, and a complete hardware pack provide the flexibility needed to dial in leverage, stiffness, and fitment for a wide range of builds.

Kit Includes:

• 36 in. .770 in. 4130 Heat-Treated Chromoly Sway Bar
• 34 in. 1 3/4 in. .095 wall Mounting Tube
• Fabricated Steel Sway Bar Arms
  • Choose: 17 in., 18 in., or 20 in.
• Adjustable Sway Bar Links
• Delrin Sway Bar Bushings
• Weld-On Axle Tabs
• Hardware Pack
• Arm Stickers

Specifications

• Sway Bar Length: 36 in. (tip to tip)
• Sway Bar Center Diameter: .770 in.
• Sway Bar Material: 4130 heat-treated chromoly
• Arm Material: Fabricated laser-cut & welded steel
• Arm Length Options: 17 in., 18 in., 20 in., or bent 20 in.
• Spline Count: 25 spline
• Application Type: Universal / Fabricator install

Fitment

• Universal application
• Intended for custom rigs, buggies, and fabricated suspensions
• Not a bolt-in kit welding required

Tech Insight

The .770-inch torsion bar offers a balanced AntiRock rate well-suited for mid-to-heavy-weight rigs and higher-speed trail use. Steel arm length selection allows fine-tuning of effective stiffness:

17 in. arms: Firmest effective rate, compact packaging

18 in. arms: Balanced performance for most builds

20 in. arms: Softer effective rate, increased articulation

Steel arms are ideal for aggressive trail use, competition, or builders who prioritize long-term durability over weight savings.

Important Notes

Installation: Welding required; universal fabricator kit

Body Roll: Increased body roll compared to factory sway bars

Street Use: Street-drivable, but handling differs from OEM sway bars

End Links: Long-thread links can be trimmed to fit; alternate lengths available depending on lift height