RockJock AntiRock Front Sway Bar Kit - Jeep JK Wrangler
ROKCE-9900JKF
The RockJock AntiRock Front Sway Bar Kit is a direct bolt-on suspension upgrade for the Jeep JK Wrangler and JK Wrangler Unlimited. Designed specifically for off-road performance, the AntiRock replaces the factory front sway bar with a torsion bar system that increases suspension articulation, improves traction, and provides predictable handling on the trail—without ever disconnecting the sway bar.
Unlike factory electronic disconnect systems, the AntiRock remains engaged at all times, allowing both sides of the suspension to work together throughout suspension travel. The result is improved stability on uneven terrain, increased traction, and more consistent handling both on and off the trail.
Built around a .850-inch heat-treated 4340 chromoly torsion bar, this complete kit includes forged chromoly sway bar arms, forged 4140 chromoly frame brackets, sealed adjustable end links, Delrin bushings, and all hardware required for a straightforward bolt-on installation.
Includes:
- .850" Heat-Treated 4340 Chromoly AntiRock Torsion Bar
- Forged Left Frame Bracket
- Forged Right Frame Bracket
- Pair of Forged Offset Chromoly Sway Bar Arms
- Pair of Adjustable Sealed End Links
- Delrin Pivot Bushings
- Sway Bar Hardware Pack
- RockJock Arm Stickers
Specifications
| Specification | Details |
|---|---|
| Application | Front Sway Bar System |
| Vehicle Fitment | Jeep JK Wrangler & JK Wrangler Unlimited |
| Torsion Bar Diameter | .850" |
| Torsion Bar Material | Heat-Treated 4340 Chromoly |
| Frame Brackets | Forged 4140 Chromoly |
| Sway Bar Arms | Forged Offset Chromoly |
| End Links | Adjustable with Sealed Rod Ends |
| Bushings | Delrin |
| Spline Count | 25-Spline |
| Installation | Direct Bolt-On |
Fitment
Fits:
- Jeep JK Wrangler (2-Door) – Front Suspension
- Jeep JK Wrangler Unlimited (4-Door) – Front Suspension
Installation Notes:
- Direct bolt-on installation with no welding required.
- JK Rubicon models equipped with the factory electronic sway bar disconnect require an AEV ProCal or equivalent programmer to disable the dashboard warning light after removal.
- Supplied end links are designed for approximately 4" of suspension lift.
- End link rods may be trimmed or replaced with alternate lengths to suit your suspension setup.
- Some vehicles may require the RockJock CE-9901D-SP4 Shim Pack to fine-tune sway bar arm spacing due to factory frame width variations.
- Expect increased body roll compared to the factory sway bar. This is normal and allows improved suspension articulation.
- Street-drivable, but vehicle handling characteristics will differ from the factory sway bar system.
Tech Insight
Designed for Real Off-Road Performance
Unlike disconnect-style sway bars that are either fully connected or completely disconnected, the AntiRock torsion bar continuously balances suspension movement between both sides of the axle. This keeps the tires planted more consistently over uneven terrain while improving driver confidence on technical obstacles.
Tuned for the Weight of the JK Platform
The larger .850-inch torsion bar delivers a firmer spring rate than smaller AntiRock bars, making it ideal for the heavier JK Wrangler platform. It provides excellent body control while still allowing substantially more articulation than the factory sway bar during off-road use.
Built for Long-Term Reliability
Forged chromoly sway bar arms and forged 4140 frame brackets offer exceptional fatigue strength for aggressive rock crawling and trail use. Combined with self-lubricating Delrin bushings and sealed rod-end end links, the system delivers years of quiet, maintenance-free operation without the complexity of electronic disconnect mechanisms.
