SWAY BAR ARM, STEEL, 1 1/4-48 SPLINE, BENT 30 DEGREES
SKU 613-3B
Category: High-Performance 30-Degree Bent Sway Bar Arms (Pair)
Engineered for hardcore competition, long-travel off-road racing, trophy trucks, and custom chassis fabrication, this 18 3/8” bent steel sway bar arm set delivers massive structural rigidity while solving complex tire and frame clearance issues. Standard straight sway bar arms often collide with oversized off-road tires at full steering lock or bind against chassis components during extreme suspension articulation. Featuring a precision 30-degree outward bend, this heavy-duty arm set bypasses structural obstacles, ensuring instantaneous anti-roll stabilization and predictable, flat handling dynamics without sacrificing your vehicle's steering radius or suspension travel.
Performance & Fitment
Application: Custom long-travel off-road race cars, Ultra4 rock crawlers, prerunners, and specialized heavy-duty aftermarket anti-roll bar assemblies.
Spline Profile: 1 1/4"-48 (Precision 1.25-inch nominal bore featuring 48 teeth; engineered to interface perfectly with matching 1.25" splined sway bar core tubes).
Length: 18 3/8" (Center-to-center measurement from the splined drive bore to the end-link mounting point).
Design Geometry: 30-Degree Offset Bend. Specifically angled to curve away from the frame rails, providing essential clearance for wide racing tires, bypass shocks, or steering linkages during hard cornering and deep compression.
Premium Construction
Material: USA-Made A-572 Grade 50 Steel. Forged from high-strength, low-alloy structural steel renowned for its exceptional yield strength and structural memory under extreme torsional loads.
Finish: Zinc Black Coating with a Brushed Sanded Look. Provides robust, long-lasting corrosion resistance against moisture, salt, mud, and track debris while delivering a premium, rugged, semi-matte aesthetic.
Clamping System: Features an integrated split-collar design complete with heavy-duty mounting clamp bolts. This system locks the arm mechanically to the sway bar core, completely eliminating any possibility of splined stripping or axial walking.
🛠️ Custom Fabricated Sway Bar Setup & Tech Notes
Integrating a 30-degree bent splined sway bar arm into a custom suspension system requires precise installation tolerances to prevent chassis binding:
📐 Left & Right Orientation Awareness: Because these arms feature a 30-degree directional bend, they are side-specific. Ensure they are installed so that the bend curves outward away from the frame rails to clear the tires. Swapping the sides will cause the arms to angle inward, resulting in catastrophic interference with your frame clip, fuel lines, or cooling networks upon the very first suspension cycle.
📐 Flawless Arm Parallelism: When installing timed sway bar arms onto a splined core bar, you must ensure both arms sit completely parallel to each other when the chassis is at rest. Because the internal splines are precision-timed, a mismatch of even a single tooth from side to side will pre-load the anti-roll system at ride height. This creates an artificial weight bias, causing the vehicle to steer or lean unevenly and resulting in unpredictable handling when turning left versus right.
❌ Cycle Suspension to Check Clearence: Before finalizing your sway bar mounting locations, cycle the suspension through its entire range of motion—from full compression (bump) to full extension (droop)—and turn the steering wheel completely from lock to lock. Verify that the 18 3/8" bent arm clears all brake lines, shock reservoirs, tire sidewalls, and control arms through the entire operational envelope.
🔩 Torque Specification for Split-Collar Clamp Bolts: The included high-tensile clamp bolts are the primary line of defense keeping the arm from sliding or wobbling on the sway bar splines. Thoroughly clean the core bar splines and the arm internal teeth before assembly. Once slipped into position, tighten the split-collar clamp bolts progressively using a calibrated torque wrench. Ensure you reach the structural hardware rating (typically 45–50 ft-lbs / 61–68 N·m for premium Grade 8 / Class 10.9 fasteners) to fully seat the split-jaw onto the core bar.
❌ Anti-Seize Preference: Apply a thin film of high-pressure, anti-seize lubricant directly onto the core bar splines before sliding the arm on. While the split-collar clamps the arm tightly, moisture can still migrate into the microscopic gaps between the 48 teeth. Anti-seize prevents environmental rust-welding, allowing you to easily remove or service the arms in the future without damaging the splines with a hammer.
What’s Included
(1) Sway bar arm set with mounting bolts
Warranty
Backed by a 1-year warranty for peace of mind.
Stock Information
Available for backorder.