2001-2010 GMC Sierra 2500HD / 3500 4WD/2WD - Torsion Bar Adjuster Kit by Kryptonite

KRKN10 torsion key adjusting bolt and key stop kit is designed as a direct factory replacement upgrade for GMC Sierra 2500HD / 3500 requiring increased strength, improved alignment, and long-term durability. Built for Duramax and similar heavy-duty applications, this kit replaces the factory torsion key hardware with higher-strength components engineered to handle increased loads from leveling kits and non–torsion–bar drop–lift setups.

Each kit features larger 14mm Grade 10.9 adjusting bolts finished in a gold zinc coating for superior corrosion resistance and reliable clamping force under heavy load. The forged key stops are also gold-zinc-coated and feature wider retention cuts, allowing the adjuster bolt to sit more centrally within the torsion key. This improved alignment reduces stress on the torsion key and surrounding suspension components while maintaining the same adjustment range as the factory hardware.

Designed for seamless installation, the KRKN10 kit installs directly in place of OEM components, requiring no modifications. By improving bolt alignment, increasing hardware strength, and enhancing corrosion resistance, this kit provides a simple yet effective way to restore adjustability, extend component life, and improve overall suspension reliability on lifted or leveled trucks.

Features and Benefits:

• Grade 10.9 adjusting bolts provide a high-strength clamping force under heavy load and demanding driving conditions
• Gold zinc–coated finish offers enhanced corrosion resistance for long-term durability
• Larger 14mm adjuster bolts deliver increased strength and reliability, ideal for Duramax applications
• Direct factory replacement design installs seamlessly in place of OEM torsion key hardware
• Expanded-fitment key stops allow increased angle movement for leveling kits and non–torsion bar drop lift kits
• Widened retention cuts help better center the adjuster bolt within the torsion key
• Improved bolt alignment reduces stress on torsion keys and surrounding suspension components
• Maintains the same adjustment range as factory hardware while improving overall system longevity
• Includes two 14mm gold zinc–coated Grade 10.9 adjusting bolts
• Includes two forged, gold zinc–coated torsion key stops for increased strength and wear resistance