CST 4" STL Stage 3 Suspension System — 20-25 Chevy / GMC HD 3500HD 2WD/4WD

A true 4" of lift in the stock torsion location — no cutting the factory X-member or UCA pocket — for 2020–2025 Chevy Silverado / GMC Sierra 3500HD (2WD & 4WD). High-clearance, StabiliTrak-approved, keeps the factory load rating, and fully reversible to stock.

What this stage includes

• High-clearance fully-boxed X-members with diff-drop brackets
• US-made cast-iron steering knuckles and a steel lower diff skid plate
• Torsion brackets/sleeves and rear lift blocks with U-bolts
• O.E. front shock adapters and all hardware
• Plus CST DIRT-Series 2.0 emulsion front and rear shocks

Why CST

• TRUE 4" lift with no cutting or modifying the factory torsion X-member or UCA pocket
• High-clearance boxed X-members for superior control-arm, CV and tie-rod angles
• StabiliTrak-approved, retains the factory load rating and tow capacity, reversible to stock
• Built in-house by CST in the USA; clears up to 37" tires

Good to know

• Wheel backspacing: 17" — 5", 18" — 5.75", 20" — 6"
• 3500 trucks with the factory overload spring may require a longer U-bolt
• Professional installation and alignment recommended