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Tune roll control around a custom chassis layout
RockJock CE-9901-20B gives a qualified fabricator the core parts needed to add a serviceable Antirock system where a bolt-in vehicle kit is not available.
Key Features
- 36-inch-long 4340 heat-treated chromoly torsion bar
- 20-inch bent fabricated-steel arms
- 34-inch weld-in mounting tube
- Adjustable links with trim-to-fit threaded sections
- UHMW frame bushings and weld-on axle tabs
- Designed to remain connected during on-road and off-road use
- Made in the USA
Fitment
| Years | Make or Application | Model or Dimensions | Verified Notes and Exclusions |
|---|---|---|---|
| Universal | Custom off-road chassis fabrication | 36-inch bar; 34-inch mounting tube; 20-inch bent arms | Requires welding and application-specific geometry; not a bolt-in kit; verify clearance through full suspension travel |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | CE-9901-20B |
| Bar | 36 inches long x 0.770 inch diameter |
| Bar Material | 4340 heat-treated chromoly |
| Mounting Tube | 34 inches long x 1.75 inches x 0.095-inch wall |
| Arms | 20-inch bent fabricated steel |
| Bushings | UHMW |
| UPC | 810038153841 |
| Installation | Welding and fabrication required |
What's Included
- One 36-inch chromoly torsion bar
- One 34-inch mounting tube
- Two 20-inch bent steel arms
- Adjustable sway-bar links
- UHMW bushings
- Weld-on axle tabs
- Hardware pack and arm stickers
- Welder, fabrication materials, application-specific brackets, and unrelated chassis hardware are not included
About RockJock
RockJock develops rebuildable suspension and steering components for controlled articulation. Its Antirock systems use torsion-bar geometry to balance suspension movement without a trail disconnect mechanism.
Related Parts
- Application-engineered frame and axle reinforcement
- Correct-length replacement links when the supplied links cannot be safely trimmed to the required geometry
- Qualified welding consumables for the selected chassis materials
- RockJock service parts matched to the included bar, arms, and bushings
FAQ
What is the CE-9901-20B?It is a universal 36-inch Antirock sway-bar kit with bent 20-inch steel arms for a custom fabricated installation.
Is this a bolt-in kit?No. It requires welding, fabrication, and application-specific suspension geometry.
What material is the torsion bar?RockJock specifies 4340 heat-treated chromoly.
Can the supplied links be shortened?Yes. RockJock states that the long threaded sections may be trimmed when a qualified installer determines the correct length.
Does the Antirock need to be disconnected off road?No. It is designed to remain connected, provided the custom installation has been engineered correctly.
Will the vehicle have the same body-roll feel as a factory sway bar?No. RockJock warns that Antirock-equipped vehicles exhibit more body roll than vehicles using factory sway bars.
Does it have year-make-model fitment?No. Selection depends on available space, mounting geometry, loads, link travel, and fabrication quality.
Is welding equipment included?No. Welding equipment and application-specific fabrication supplies are not included.
Installation Instructions
- Confirm that the chassis has the required bar, tube, arm, and link clearances through full suspension and steering travel.
- Verify the package label and inspect every component before fabrication.
- Engineer the mounting tube location, arm clocking, axle tabs, link angles, reinforcement, and fastener loads for the vehicle.
- Prepare the chassis and mounting tube using a qualified welding procedure for the selected materials.
- Install the bushings, torsion bar, and arms with equal usable engagement and no bind.
- Set the adjustable links to keep the arms properly oriented at ride height; trim only within RockJock guidance.
- Cycle the suspension and steering through full travel while checking tire, driveline, brake-line, exhaust, frame, and body clearance.
- Torque all hardware, perform a controlled road test, and recheck fasteners and clearances after the first heat cycles.
California Proposition 65 Warning: Cancer and reproductive harm. See www.P65Warnings.ca.gov.
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