RockJock RJ-202001-103 15in 2.5in Offset Antirock Arms for 28-Spline Torsion Bar

Vehicle Fitment

• Universal - fits any RockJock Antirock sway bar system using a 28-spline heavy-duty/overlanding torsion bar (not vehicle-specific by itself)
• Included component in: CE-9900JKF - JK Wrangler/Unlimited Antirock Front Sway Bar Kit (.850 in. bar)
• Included component in: RJ-236100-101 - JK Wrangler/Unlimited Antirock Heavy Load Front Sway Bar Kit (1 in. bar)
• Included component in: RJ-246100-103 - JL Wrangler/JT Gladiator Antirock Heavy Load Front Sway Bar Kit (1 in. bar)
• Included component in: RJ-286100-101 - 2021-up Ford Bronco Antirock Front Sway Bar Kit

Fitment Notes

• 28-spline mounting end - not compatible with RockJock's standard 25-spline Antirock torsion bars (see RJ-202001-101 for the 25-spline version of this same arm)
• Sold as a pair
• Frame width can vary between vehicles; RockJock's CE-9901D-SP4 shim pack is available separately to fine-tune arm fit against the sway bar bushings if needed

Features

• Forged 4140 chromoly I-beam construction delivers dramatic strength and rigidity over stamped steel arms
• 2 1/2 in. offset bend provides clearance in tight-frame installations
• 28-spline mounting end matches RockJock's heavy-duty, overlanding-application Antirock torsion bars
• Vertical pinch bolt hole at the mounting end secures the arm firmly to the torsion bar
• 1/2 in. end link mounting hole at the opposite end accepts standard Antirock adjustable end links
• 3/4 in. thick body machined down to 3/8 in. at the end link mounting tip for proper end link geometry
• Textured gloss black powder coat finish resists corrosion and wear
• Sold as a matched pair with arm stickers included

Specifications

• Part Number: RJ-202001-103
• Brand: RockJock 4x4
• Length: 15 in., tip to tip
• Offset: 2 1/2 in. bend
• Thickness: 3/4 in. (3/8 in. at end link mounting tip)
• Spline Count: 28
• End Link Mounting: 1/2 in. hole
• Material: Forged 4140 chromoly
• Finish: Textured gloss black powder coat
• Sold As: Pair

Included Components

• 2x Forged Chromoly Antirock Sway Bar Arms (15 in., 2.5 in. offset, 28-spline)
• Arm Stickers (pair)

Product Description

The RockJock RJ-202001-103 is a pair of 15 in. forged 4140 chromoly Antirock sway bar arms built for RockJock's heavy-duty, 28-spline torsion bar systems. Forged I-beam construction gives these arms significantly more strength and rigidity than a stamped steel equivalent, making them the arm of choice across several of RockJock's heavier-duty front Antirock kits - including the JK Wrangler heavy load kit, the JL/JT heavy load kit, and the 2021-up Bronco front kit.

Each arm features a 2 1/2 in. offset bend to clear common frame and bracket obstructions, along with a vertical pinch bolt hole at the 28-spline mounting end for a secure connection to the torsion bar. At the opposite end, a 1/2 in. hole accepts RockJock's standard adjustable Antirock end links, letting builders fine-tune leverage on the bar. The arms are finished in a textured gloss black powder coat and machine down to 3/8 in. thick at the end link tip for correct link geometry.

Because these arms are sized for RockJock's 28-spline heavy-duty torsion bars, they are not interchangeable with the standard 25-spline arms (RJ-202001-101) used in RockJock's lighter-duty Antirock kits - builders should confirm which spline count their torsion bar uses before ordering, either as a direct kit component or as a standalone upgrade/replacement part.