2020-2025 GM HD Max 3.3 6" Lift Kit w/ Falcon Shocks (42-30660)

The ReadyLIFT 6-inch MAX3.3 Premium Suspension System is engineered for 2020–2025 Chevy Silverado and GMC Sierra 2500/3500 HD trucks. This system is built for serious truck owners who demand superior performance, capability, and confidence both on and off the road. It delivers the ultimate blend of strength, handling, and ride quality, powered by vehicle-specific Falcon 3.3 Fast Adjust Piggyback Shocks. The Falcon shocks provide dual-knob adjustability, allowing drivers to fine-tune compression and rebound independently for any terrain or load.

Features

• Delivers 6 inches of lift.
• Includes Xtreme-Duty fabricated 4130 chromoly steel upper control arms (UCAs) with corrected ball joint angles for long-term durability.
• Features Falcon 3.3 Fast Adjust Dampers on all four corners, providing dual-knob adjustability.
• Adjustability includes a 3-Position Fast Adjust Knob (Soft, Custom, Firm) for instant changes and an 8-Position Micro Adjust Dial for refined damping.
• Comes with laser-cut, CNC-formed crossmembers and a full-coverage differential skid plate built from 3/16-inch steel.
• Utilizes OE-style cast iron knuckles with corrected geometry for proper steering and handling.
• Includes forged torsion keys and fabricated torsion arm brackets.
• Features cast rear lift blocks for a level stance.

Notes

• GM HD trucks with the factory Tow Package may require custom-length U-bolts, which must be purchased separately.
• Vehicle alignment, headlamp aim, and Advanced Driver Assistance Systems (ADAS) must be checked and adjusted after product installation.

Compatibility Notes

• Fits 2020-2025 Chevy Silverado and GMC Sierra 2500/3500 HD trucks.
• Does not work with AT4X or ZR2 models due to factory Multimatic shocks that cannot be replaced.
• The Single Cab configuration has not been validated for fitment and drivability by ReadyLIFT.
• Factory wheels can be used if wheel spacers are utilized.

Tire Fitment

• Maximum tire diameter is 37 inches.
• Clears up to 37x12.50 tires on 20x9-inch wheels with 0 offset for no rub.

Specs

• Lift Height: 6 inches.
  
• Shock Type: Falcon 3.3 Fast Adjust Dampers (front are coilover/remote reservoir, rears are smooth body/piggyback).
  
• Upper Control Arm Material: Xtreme-Duty fabricated 4130 chromoly steel.
  
• Kit Contents: Front/Rear Crossmembers, Cast Iron Knuckles, Fabricated UCAs, Falcon 3.3 Shocks, Forged Torsion Keys/Brackets, Differential Drop Brackets, CV Axle Spacers, Full-Coverage Skid Plate, Cast Rear Lift Blocks, Sway Bar End Links, and necessary hardware.