RockJock Universal Antirock Sway Bar Kit - Billet Aluminum Arms, 36" Bar
ROKCE-9901A-18
The RockJock Universal AntiRock Sway Bar Kit with Billet Aluminum Arms is designed for custom tube chassis, rock crawlers, Ultra4 race cars, trail rigs, and fabricated suspensions that demand predictable handling while maintaining exceptional off-road articulation. Unlike traditional sway bars that require disconnecting on the trail, the AntiRock system remains connected at all times to improve traction, stability, and driver confidence over uneven terrain.
At the center of the kit is a 36" heat-treated 4130 chromoly torsion bar measuring .770-inch in diameter, paired with lightweight 20-inch CNC-machined billet aluminum sway bar arms. The longer arm length provides increased leverage for a softer effective sway bar rate and greater suspension articulation while significantly reducing unsprung weight compared to steel arms.
This universal fabricator kit includes nearly everything required for installation. Simply weld the mounting tube into your chassis, install the adjustable end links, and fine-tune the suspension characteristics to match your build.
Includes:
- (1) 36" × .770" Heat-Treated 4130 Chromoly AntiRock Torsion Bar
- (1) 34" × 1.75" × .095" Wall Mounting Tube
- (1) Pair 18" or 20" CNC-Machined Billet Aluminum AntiRock Arms
- (2) Adjustable Sway Bar End Links
- Delrin Pivot Bushings
- Weld-On Axle Tabs
- Complete Installation Hardware
- RockJock Arm Stickers
Specifications
| Specification | Details |
|---|---|
| Product Type | Universal AntiRock Sway Bar Kit |
| Sway Bar Length | 36" |
| Sway Bar Diameter | .770" |
| Sway Bar Material | Heat-Treated 4130 Chromoly |
| Arm Material | CNC-Machined Billet Aluminum |
| Arm Length | 18" or 20" |
| Spline Count | 25-Spline |
| Mounting Tube | 34" × 1.75" OD × .095" Wall |
| Installation | Universal Weld-On |
Fitment
Designed For:
- Rock Crawlers
- Rock Bouncers
- Ultra4 Race Cars
- Trail Rigs
- Custom Tube Chassis
- Fabricated Suspension Systems
Installation Notes:
- Universal weld-on fabricator kit
- Professional welding and fabrication required
- Not intended as a direct bolt-on application
- Threaded end links may be shortened or adjusted to suit ride height and suspension geometry
Tech Insight
Why Choose an AntiRock Sway Bar?
Unlike factory sway bars that are commonly disconnected off-road, the RockJock AntiRock is engineered to remain connected at all times. It transfers suspension loads between both sides of the axle, reducing excessive body roll while allowing significantly more articulation than conventional sway bars.
Advantages of Billet Aluminum Arms
The included 20-inch billet aluminum arms provide additional leverage over shorter arms, producing a softer effective sway bar rate and increased articulation. Their lightweight construction also reduces unsprung weight while maintaining exceptional strength, making them an excellent choice for high-performance trail rigs, Ultra4 race cars, and custom competition builds.
Designed for Fabricators
This universal kit allows builders complete freedom when positioning the sway bar to achieve ideal suspension geometry. As your suspension evolves, the adjustable end links and interchangeable AntiRock components make future tuning simple without replacing the entire sway bar system.
Important Notes
- Welding and fabrication are required for installation.
- Vehicles will exhibit more body roll than with a factory sway bar.
- Street manners remain predictable but will differ from OEM handling characteristics.
- Threaded end links can be shortened or replaced to suit individual ride heights and suspension configurations.
