CST 4-6" STL High-Clearance Lift Kit (All Stages) — 11-19 Chevy / GMC HD 2500HD/3500HD 2WD/4WD

A true 4" of high-clearance lift in the stock torsion location — up to 6" with torsion keys — for 2011–2019 Chevy Silverado / GMC Sierra 2500HD, 3500 & 3500 Dually (2WD & 4WD). Maximum ground clearance while keeping the stock ride and handling. Pick your stage from the dropdown to set the shock package.

What every stage includes

• Gusseted, fully-boxed high-clearance cross-members with a full-size steel diff skid plate
• US-made cast-iron CNC-machined steering knuckles
• Diff-drop, bump-stop, and brake-line drop brackets
• Extended sway-bar end links and built-in stabilizer brackets
• O.E. front shock relocator/adapter brackets (reuse factory shocks at base)
• Billet 1" rear lift blocks, HD zinc-plated U-bolts, and all hardware

Choosing your stage

• Stage 1 — base lift; reuses your factory front shocks (rear shocks sold separately)
• As you climb the stages, the shock package steps up — CST DIRT-Series 2.0 (rear, then front and rear), then DIRT-Series 2.0 remote-reservoir, up to PRO-Series 2.5 adjustable shocks with compression-damping adjusters
• “Ball Joint UCA” options swap the uniball upper control arms for boxed ball-joint UCAs with quiet OE-style bushings

Why CST

• TRUE 4" lift without dropping the factory torsion cross-member
• Near-factory track width and StabiliTrak-approved
• 1/4"+ steel, built in-house by CST in the USA — no cutting or welding, reversible to stock

Good to know

• Torsion keys required for 5–6" of lift; added rear lift needed for a level stance once keys are in
• Longer shocks may be required above 4" (available from CST)
• Fits 3500/Dually; may need longer U-bolts with overload springs
• Wheel backspacing: 17–18" — 5"; 20"+ — 5.5"
• Professional installation and alignment recommended