Description
Dirt King 4130 Upper Control Arms – Built to Solve Real Problems
If you drive a 2025+Toyota 4Runner 4WD or 2024+ Land Cruiser 250 and ready for a suspension upgrade, these 4130 UCAs are for you. We made them to tackle the exact issues we kept running into ourselves—squeaky bushings, joints that need constant attention, and geometry thrown off as soon as you add a lift. Whether you’re daily driving, overlanding, rock crawling, or chasing desert trails, these UCAs handle it all.
These arms feature maintenance-free SilentSpin™ bushings that eliminate grease fittings and unwanted noise, along with heavy-duty Probearing Pro 4 ball joints for high articulation and superior strength. The ball joints are sealed to block out debris and finished with anodized caps. Built to maintain proper alignment from 0–3″ of lift, these arms also add roughly an inch of down travel compared to stock, a must-have when paired with our shocks or other aftermarket coilovers like King, Fox, Icon, and more.
Why Go Dirt King?
- Pro 4 Series Ball Joints – Forged SAE4140 housing, 38° of articulation, and induction-hardened ball stud for maximum strength and smoother steering feel
- SilentSpin Hybrid Bushings – Maintenance-free, greaseless, and engineered for quiet, free-spinning articulation
- Geometry Corrected – Improved caster and pivot angles deliver better handling and control with up to 3” of lift
- 4130 Chromoly Construction – Built with high-strength tubing and reinforced gussets for extreme durability
- Fully Rebuildable Design – All wear items are replaceable for long-term reliability
- Corrosion-Resistant Finishes – Zinc-plated hardware and black powder coat protect against the elements
- Professionally MIG Welded – Ensures structural integrity for demanding off-road use
- Preassembled – Quick, hassle-free installation with no guesswork
- Made in the USA – Built with pride and quality you can trust
Upgrade Your 4Runner With Confidence
Built and tested in the USA, these 4130 UCAs are engineered for the long haul—perfect for rigs that work hard on weekdays and explore even harder on weekends. It’s the last set of upper control arms you’ll ever need.
Toyota 4Runner UCA Specifications:
- Amount of Lift: Allows for 0-3” of lift
- Track Width: Stock
- Maximum Backspacing: 5.75”
- Minimum Rim Size: 17”
Wheel Travel / Lift
The upper control arms must be paired with OEM replacement coil overs to lift the vehicle. They offer an additional 1” of down travel compared to the stock upper control arms. These arms are compatible with King, Fox, Bilstein, ADS and Icon coil overs. Do not install these upper control arms with coil spacers that over articulate the suspension.
What’s Included?
- 4130 Chromoly upper control arms
- Probearing SilentSpin Hybrid bushings
- Probearing Pro 4 Superior Performance Ball Joints
- Ball joint caps
- Dirt King sticker pack
Features:
- Pro 4 Series Ball Joints – Forged SAE4140 housing, 38° of articulation, and induction-hardened ball stud for maximum strength and smoother steering feel
- SilentSpin Hybrid Bushings – Maintenance-free, greaseless, and engineered for quiet, free-spinning articulation
- Geometry Corrected – Improved caster and pivot angles deliver better handling and control with up to 3” of lift
- 4130 Chromoly Construction – Built with high-strength tubing and reinforced gussets for extreme durability
- Fully Rebuildable Design – All wear items are replaceable for long-term reliability
- Corrosion-Resistant Finishes – Zinc-plated hardware and black powder coat protect against the elements
- Professionally MIG Welded – Ensures structural integrity for demanding off-road use
- Preassembled – Quick, hassle-free installation with no guesswork
- Made in the USA – Built with pride and quality you can trust
Compatibility:
2025+ Toyota 4Runner 2WD / 4WD
2024+ Toyota Land Cruiser 250 2WD / 4WD
Want to learn more about Dirt King Fabrication?
https://dirtkingfabrication.com/pages/disclaimer
https://dirtkingfabrication.com/pages/returns
Vehicle Fitment:
2025 Toyota 4Runner
2026 Toyota 4Runner
2024 Toyota Land Cruiser 250
2025 Toyota Land Cruiser 250
2026 Toyota Land Cruiser 250
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