4 Inch Lift Kit | At4/trailboss | N3 Struts | Chevy/gmc 1500 (25-26)

Built for AT4 and Trailboss owners who want commanding height without sacrificing ride quality — this 4-inch lift kit combines durable steel knuckles, differential brackets, and drop cross members to preserve factory suspension geometry while gaining serious ground clearance. You'll run 33" to 35" tires confidently, with the kit engineered to maintain proper CV angles and factory-like articulation front to rear.

Installed and serviced at Road Runner Wheels & Tires. Most lift kits go in the same day. Call (678) 400-6467 to schedule.

What's included

• Universal Kit Box — core components fitted for your 2025–2026 Silverado or Sierra 1500.
• 6-inch Kit Knuckle Boxes (driver and passenger) — cast knuckles engineered for extreme durability and reduced CV angles.
• 6-inch Kit Crossmember Box — high-clearance drop cross member that optimizes suspension geometry and maintains stock track width.
• Front Skid Plate — protective fabricated steel for underbody clearance.
• N3 Shock Pair — nitrogen-charged shocks tuned for the lift height and ride control.
• Loaded Strut Pair (6-inch) — factory-compatible upper struts with integrated spacers — no strut disassembly required.
• Rear Blocks, U-Bolts, and Hardware — completes the rear suspension with factory-like geometry retention.

Important notes

• Model fit: ONLY fits LT Trailboss, Custom Trailboss, and AT4 models equipped with GMΓÇÖs factory 2-inch lift.
• Wheel requirement: Does NOT fit factory wheels. 20-inch or larger aftermarket wheels are required, with 4.5-inch backspacing. Test fit wheels prior to installation — some aftermarket wheels may require a 0.25-inch wheel spacer (#1065).
• Installation notes: Requires minor cutting and drilling. A strut compressor is necessary for upper strut removal and installation.
• Tire range: This kit supports 33" to 35" tires without additional modifications.

Why customers pick this at Road Runner

• Geometry-corrected engineering — steel knuckles and drop cross members preserve factory suspension angles, protecting ride quality and component life.
• Rough Country limited lifetime warranty backed locally — structural and workmanship protection from day one.
• Professional installation by techs who do these builds every week — precision alignment performed in-house as part of every lift install.
• One-day turnaround on most kits — get back on the road faster.

Ready to build it? Call (678) 400-6467. Hablamos Español.