Kryptonite’s Boxed Upper Control Arm Kit is one of the most effective upgrades for the front end of your GM HD truck. Whether you’re running stock suspension, a level kit, or most lift kits, these upper control arms deliver improved strength, durability, and ride quality,all while maintaining proper suspension geometry.

Built from precision laser-cut steel and TIG-welded into a rigid boxed design, these arms are engineered for performance and longevity. Included bolt-on ball joints and hardware make installation straightforward, and the arms are fully serviceable.

For added alignment control and long-term durability, Kryptonite recommends upgrading with the optional Cam Bolt Kit #KR0026, especially if your truck sees off-road use, harsh winters, or has high mileage.

• Boxed Arm Design – Laser-cut and TIG-welded for extreme strength and durability
• Made in the USA – Built with pride in small-town America and backed by Kryptonite’s lifetime warranty
• Bolt-On Upgrade – Compatible with stock or leveled 2500HD–3500HD trucks and many lift kits
• Upgraded Ball Joints Included – Includes Kryptonite bolt-on upper ball joints, pre-greased and ready to install
• Improved Ride & Alignment – Helps maintain factory geometry while improving strength and performance with added caster
• Pre-Greased with Chevron EP2 – Ready for installation; service every 5-7k miles