King Kong Adjuster Arm - 44 Tooth

• • Application: Vintage 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: 44-Tooth VW Outer Spline Format. Precision-broached to accept a 44-tooth spline count. This is ideal for specialized custom or vintage racing applications where the torsion bar features the larger 44-tooth layout on both the inner (chassis) and outer (spring plate) ends.

  • 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 7021 arm, pay strict attention to your baseline "clocking" angle. Because the arm features a fine 44-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 7021 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 7021 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 Configuration: Standard factory Volkswagen rear torsion bars feature an unequal design (40 splines on the inner end and 44 splines on the outer end). This SKU 7021 arm features a 44-tooth inner bore and is not compatible with standard factory VW torsion bars. You must verify that your vehicle is equipped with specialized custom racing torsion bars featuring 44-tooth splines on both ends before attempting installation. Forcing a standard 40-tooth bar end into this 44-tooth arm will instantly destroy the precision-broached internal teeth.

• ❌ 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 44-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.