- 6" Lift Kit GM HD Trucks- Heavy-duty fabricated steel components utilizing 3/16? and 1/4? steel plate- Full-coverage differential skid plate constructed from 3/16? steel plate- Laser cut, CNC formed heavy-duty front/rear drop crossmembers.- 37x12.50 with a 20×9” with a 0 offset wheel- Vehicle-specific performance-tuned Falcon 2.1 monotube dampers on all four corners.- Improved dynamic roll control and low-speed damping.- Dramatic improvement in on-road comfort and off-road performance.- Optimized fitment for unobstructed suspension travel and articulation.- 6061-T6 aluminum alloy shock body resists Impact to protect internal components.- Smooth-honed internal shock body surface for long-term performance.- 3/4” induction hardened chrome plated shaft resists rock damage, corrosion, and shaft buckling.- Large shaft diameter provides a wide range of adjustments on adjustable shocks.- Hard anodized 6061-T6 aluminum alloy billet piston.- 1-piece Teflon bronze piston wear band w/ O-ring.NOTE:  Some GM HD trucks equipped with Tow Package may require custom-length U-bolts purchased separately. Custom U-bolt length may vary by vehicle application.  If the ReadyLIFT kit's standard U-bolts are too short, ReadyLIFT recommends locally sourcing custom U-bolts built to each truck's specifications.