King Kong Adjuster Arm - 40 Tooth

• • Application: Modern off-road race cars, long-travel sand cars, Baja Bugs, and custom off-road racing buggy chassis platforms.

  • Component Synergy: Engineered to fit and operate exclusively inside Sway-A-Way King Kong Adjuster Housing PN 7020.

  • Spline Profile: Standard 40-Tooth VW Inner Spline Format. Precision-broached to accept a 40-tooth spline count. This matches the standard factory inner spline layout of vintage air-cooled VW rear torsion bars, making it ideal for standard-style performance replacement torsion bars.

  • Use Case: Perfect for long-travel off-road vehicles that require frequent chassis tuning, corner balancing, and instant ride height corrections for varying track terrain or payload weights.




​Premium Construction

• • Material: CNC-Machined Alloy Steel. Sculpted from premium-grade alloy steel billet utilizing advanced CNC machining processes to guarantee flawless dimensional accuracy and absolute structural uniformity.

  • Heat Treatment: Through-hardened and heat-treated to an optimized tensile strength, allowing the arm to endure brutal off-road shock loads and continuous high-amplitude torsional twist without cracking or stripping out the internal teeth.

  • Finish: Protective Black-Plated Coating. Sealed with a durable protective plating that delivers superb resistance against corrosion, moisture, track mud, and abrasive sand.

🛠️ VW Rear Torsion King Kong Adjuster Tech & Installation Notes

Integrating an oversized King Kong quick adjuster system into an off-road racing chassis requires precise installation tolerances to operate flawlessly under severe track abuse:

• 📐 Flawless Indexing and Baseline Clocking: When installing the matching PN 7020 housing into your chassis torsion tube and sliding in this 7023 arm, pay strict attention to your baseline "clocking" angle. Because the arm features a 40-tooth internal spline, miscalculating your initial orientation by even a single tooth will drastically alter your baseline ride height. Always set the mechanical adjuster bolt to its exact middle or neutral position before sliding the arm onto the torsion bar. This ensures you have an even distribution of upward and downward adjustment sweep.

• 🔥 Manage Weld Heat on the Housing Companion (PN 7020): While this 7023 arm is a slip-in component, its matching housing must be welded directly into the center of the vehicle's rear torsion tube. To prevent warping or distorting the precision internal tracks where this adjuster arm must smoothly pivot, do not have the 7023 arm installed inside the housing while welding. Use a high-penetration MIG or TIG process on the housing, allow the chassis tube to cool completely and naturally at room temperature, and then slide the adjuster arm in. Never quench hot chromoly or high-tensile steel in water.

• ⚠️ Verify Torsion Bar Spline Orientation: Air-cooled VW and buggy rear torsion bars are side-specific and directional. They feature an unequal spline layout—typically 40 splines on the inner end (which slides into this 7023 adjuster arm at the center of the car) and 44 splines on the outer end (which connects to your outer spring plate). Double-check your torsion bar stamps to ensure you are inserting the correct 40-tooth end into this arm. Attempting to force the wrong side in will permanently gall and destroy the precision-broached internal splines.

• ❌ Apply High-Pressure Anti-Seize Generously: Because this component sits at the absolute center of the chassis torsion housing, it is highly susceptible to trapping condensation, trail water, or fine silt. Before final assembly, pack the internal 40-tooth splines and the outer mating tracks of the arm with a liberal layer of waterproof, high-pressure anti-seize or premium marine grease. This prevents the steel components from rust-welding over time, ensuring effortless adjustments down the road.

• 🔩 Secure the Locking Hardware Before Driving: The mechanical adjustment bolt handles the immense rotational leverage generated by your rear suspension travel. Once you have dialed in your target ride height on an alignment rack or scale pads, ensure the locking nuts or set screws are fully torqued to specification. Operating the vehicle with loose adjuster hardware can cause the internal arm to slip violently, resulting in an instantaneous drop in suspension height and a total loss of vehicle control. 

What’s Included

• King Kong Adjuster Arm (sold individually)

Warranty

Backed by a 1-year warranty for peace of mind.