Kryptonite Stage 3 Leveling Kit with Fox 2.5 Performance Elite Shocks for 2019+ Chevy/GMC 1500 AT4/Trail Boss

Fits:

• 2019+ Chevy Silverado 1500 Trail Boss
• 2019+ GMC Sierra 1500 AT4

Important Fitment Information:

• Designed specifically for Trail Boss and AT4 models
• Not compatible with vehicles originally equipped with Adaptive Ride Control (ARC)
• Not compatible with vehicles equipped with Super Cruise
• FOX 2.5 Performance Elite coil-overs provide approximately 1.5” of additional front lift
  
• Allows clearance for up to a 33” tire (actual fitment may vary based on tire design and wheel specifications)

Tire Clearance Notes:

• When used with OEM wheels, maximum recommended tire tread width is 11.2”
• Tires exceeding 11.2” tread width will require wheels with 5.6” backspacing or less

Features:

• Premium Suspension Upgrade – Combines FOX 2.5 Performance Elite reservoir coil-overs, FOX Performance Elite rear shocks, and Kryptonite Upper Control Arms into a complete bolt-on suspension package.
• 1.5” Additional Front Lift – FOX Performance Elite coil-overs are preset to provide approximately 1.5” of additional front lift while maintaining excellent ride quality and vehicle control.
• Remote Reservoir Technology – External reservoirs increase shock oil and nitrogen capacity for improved cooling, consistency, and fade resistance under demanding conditions.
• Dual Speed Compression (DSC) Adjusters – Independently tune low-speed and high-speed compression damping to match driving conditions, vehicle weight, and terrain.
• Race-Proven FOX Performance Elite Shocks – Derived directly from FOX off-road racing technology and engineered for maximum control in challenging environments.
• 2.5” Aluminum Shock Bodies – Impact-extruded and CNC-machined aluminum bodies efficiently dissipate heat while resisting corrosion.
• Internal Floating Piston (IFP) Design – Separates shock oil from the nitrogen charge to reduce aeration and maintain consistent damping performance.
• Heavy-Duty Boxed Upper Control Arms – Laser-cut and robotically welded steel construction provides exceptional strength and durability.
• Bolt-On Upper Ball Joints – Serviceable design allows individual ball joint replacement without replacing the complete control arm.
• Optimized Suspension Geometry – Upper control arms help maintain proper ball joint angles and suspension travel at the increased ride height.
• Increased Tire Clearance – Allows clearance for up to a 33” tire when used with the recommended wheel specifications.
• Direct Bolt-On Installation – No cutting, welding, or permanent modifications required.

Description:

The Kryptonite Stage 3 FOX 2.5 Performance Elite Suspension Kit represents the highest level of bolt-on suspension performance available for 2019+ Chevrolet Silverado 1500 Trail Boss and GMC Sierra 1500 AT4 models. Combining FOX’s premium Performance Elite reservoir shocks with Kryptonite’s heavy-duty boxed upper control arms, this complete suspension package is engineered for owners who demand exceptional ride quality, increased capability, and maximum control both on and off the pavement.

FOX Performance Elite Series shocks are built using technology developed through years of off-road racing competition. Featuring large-diameter 2.5” aluminum shock bodies, external reservoirs, and Internal Floating Piston (IFP) technology, these shocks provide increased oil and nitrogen capacity for superior heat management and consistent performance during extended use. The remote reservoir design helps resist shock fade while improving damping control in harsh environments.

What truly separates the Performance Elite series from standard shock options is the inclusion of Dual Speed Compression (DSC) adjusters. These externally adjustable controls allow drivers to fine-tune both low-speed and high-speed compression damping, providing the flexibility to optimize ride quality, towing performance, load carrying characteristics, or off-road handling based on individual needs.

To complement the upgraded FOX suspension, Kryptonite Upper Control Arms are included to maintain proper suspension geometry and ball joint operating angles at the increased ride height. Manufactured from laser-cut steel and robotically welded into a heavy-duty boxed design, these control arms provide the strength, reliability, and serviceability expected from Kryptonite Products.

Whether you’re building the ultimate daily driver, overland rig, tow vehicle, or weekend adventure truck, this complete suspension package delivers premium ride quality, outstanding durability, and race-inspired performance while providing clearance for up to a 33” tire.