2020-2024 Duramax 6" MAX2.1 Suspension System W/ Falcon 2.1 Shocks (42-30640)

Fits

Upgrade your 2020-2024 Chevy Silverado or GMC Sierra 2500/3500 HD trucks with ReadyLIFT's new 6" MAX2.1 Suspension System featuring Falcon 2.1 shocks. This top-of-the-line kit not only boosts your stance, but also your performance and capability, while allowing for larger wheels and tires. With vehicle-specific performance-tuned Falcon 2.1 dampers on all four corners, these lift kits give you a better-than-factory feel and three convenient Fast-Adjust settings: Sport/daily, Moderate Tow/Haul, and Heavy Tow/Haul. Falcon Performance Shocks will have you feeling comfy and confident no matter what terrain you're tackling. Whether it's your daily commute or off-road adventures, this versatile system has got you covered.

Part Number: 42-30640

• 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.

Includes:

• Heavy Duty welded steel crossmembers
• Heavy Duty iron knuckles
• Cast iron rear lift blocks with integrated bump stop landing pads.
• Heavy duty skid plate.
• Assorted hardware and accessories
• Includes 4 Falcon 2.1 Monotube Shocks.

• Estimated Install Time: 12 Hours +/- 1 Hours  (excluding alignment and wheel/tire assembly) 
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Notes:

Installation Alignment Note:  Your vehicle may require alignment after product installation. You may incur additional costs to align the vehicle.

Installation Headlamp Aim Note:  In addition to your vehicle alignment, for your safety and others, it is necessary to check and adjust your vehicle headlamps for proper aim and alignment after product installation.  You may incur additional costs to adjust the headlamp system.

 Installation Advanced Driver Assistance Systems (ADAS) Note:  If your vehicle is equipped with active or passive safety/collision monitoring and/or assistance/avoidance systems including, but not limited to, camera- or radar/sonar-based systems, check and adjust your vehicle’s systems for proper aim and function after product installation.   In some instances, your vehicle may require OEM dealer service tools and factory-trained technicians to re-calibrate ADAS.  You may incur additional costs to adjust ADAS systems.

SAEJ2492 WARNING: By installing this product, you acknowledge that the suspension of this vehicle has been modified. As a result, this vehicle may handle differently than factory-equipped vehicles. As with any vehicle, extreme care must be used to prevent loss of control or rollover during sharp turns or abrupt maneuvers. Always wear seat belts, and drive safely, recognizing that reduced speeds and specialized driving techniques may be required. Failure to drive this vehicle safely may result in serious injury or death. Do not drive this vehicle unless you are familiar with its unique handling characteristics and are confident of your ability to maintain control under all driving conditions. Some modifications (and combinations of modifications) are not recommended and may not be permitted in your state. Consult your owner's manual, the instructions accompanying this product, and state laws before undertaking these modifications. You are responsible for the legality and safety of the vehicle you modify using these components.

•  Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT.
• 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.

Tire Fitment

• 37" Maximum tire diameter
• 37x12.50 for no rub on a 9" wide wheel with 0 offset

Tire Size Note: ReadyLIFT wheel and tire fitment recommendations are typically based on Wheel Pros wheels and Nitto tires. Due to product differences among tire manufacturers, tire specifications and dimensions including, but limited to, overall diameter, rolling diameter, tread width, aspect ratio, lug pattern, sidewall construction and inflation pressure, will vary meaningfully by tire and wheel manufacturer. Every tire and wheel combination should be test fit prior to installation. Consult your local installer to learn more about the right tire fitment for your application.

Ride Quality Note: When lifting a vehicle and installing aftermarket wheels and tires, a tire manufacturer's construction and material quality can alter vehicle ride quality. When increasing a vehicle wheel and tire size, most larger aftermarket truck and SUV tires are 10-ply (or more) E tires compared to typical OEM 6-ply C tires. This more rigid sidewall construction increases the perception of suspension stiffness often described as ride harshness. The ride, handling, traction, noise, fuel economy, and wear differences between All-Season, All-Terrain, Mud-Terrain, or Trail-Terrain type tires can be significant. Please take into account tire and wheel choice will generally have a meaningful impact on the ride & handling experience.