4130 Upper Control Arm, Ball Joint

Upgrade your Toyota Tundra suspension with Dirt King upper control arms, designed for superior performance and reliability. These Toyota Tundra upper control arms are built from 4130 chromoly and engineered to fix common issues like squeaky bushings, high-maintenance joints, and poor alignment after lifting your truck. Perfect for any setup—daily driving, overlanding, rock crawling, or desert running—Tundra upper control arms from Dirt King deliver strength, precision, and long-lasting performance.

Featuring maintenance-free SilentSpin™ bushings that eliminate grease fittings and unwanted noise, along with heavy-duty Probearing Pro 4 ball joints for maximum articulation and durability, these UCAs are built to perform in any terrain. Sealed ball joints keep out dirt and debris, and anodized caps add extra protection. Designed to maintain proper alignment from 0–3" of lift, these upper control arms also add about an inch of down travel compared to stock—ideal for pairing with aftermarket coilovers like Fox, King, or Ride Shocks.

• 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