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EXTERIOR
OUR NEW ARRIVALS
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Explore our latest builds, tips, and adventures.
Description
Dirt King 4130 Upper Control Arms – Built to Solve Real Problems
If you drive a 2003-2009 Lexus GX470 4WD 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?
SilentSpin™ bushings - no squeaks or maintenance
Pro 4 ball joints with sealed dust caps
Rebuildable, USA-made construction
Precision-welded 4130 chromoly tubing
Shipped preassembled for faster installs
Upgrade Your Lexus GX470 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.
Included:
✔ 4130 Chromoly upper control arms
✔ Probearing SilentSpin bushings
✔ Probearing Pro 4 Series Ball Joints
✔ Ball joint caps
✔ Upper control arm bolts
✔ Dirt King sticker pack
Fitment: 2003-2009 Lexus GX470 4WD
Please Note: Do not install with coil spacers combined with extended-length aftermarket shocks.
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
Specs
Amount of Lift: Allows for 0-3” of lift
Track Width: Stock
Maximum Backspacing: 4.75”
Minimum Rim Size: 17”
Disclaimer
➜ Returns are only accepted within 30 days.
➜ A 3% processing fee is deducted from all refunds.
➜ On shipped orders a 7% restocking fee and a 3% processing fee is deducted from all refunds.
➜ Parts must be returned in the original package and condition as they were sent.
➜ No returns on items that have been damaged or installed.
➜ Refund will be issued once the parts have been received and inspected.
Special Notes
All products sold or manufactured by Dirt King are intended for off-road use only. Our products are strictly engineered and tested and are not to be modified from their original design in any way. Welding should always be done at a qualified and certified facility only. Customer assumes all liability in assuring that parts are installed correctly, maintained, and not modified or altered in any way. Dirt King is not responsible or liable for any accidents, injuries, or deaths that may occur from the use of any products offered. Suspension modifications may change the dynamics and stability characteristics of the vehicle. Ensuring prompt wheel alignment and ADAS recalibration after suspension modifications is critical and the sole responsibility of the customer.