ReadyLift 42-30840

8″ 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.- Allow up to 37×12.50 with a 20×9” with a 0 offset wheel- Xtreme-Duty fabricated 4130 chromoly steel upper control arms- 3.3 Fast Adjust Dampers offer a wide range of adjustability for specific terrain and/or handling characteristics with two separate knobs to tune to your preference.- 3-Position Fast Adjust Knob for Soft, Custom, and Firm Compression. Soft mode allows a partial bypass of the main piston for a softer ride- 8-Position Micro Adjust Dial offers refined damping adjustments- Reservoir design increases nitrogen to oil ratio for consistent damping over wide temperature ranges.- Hard Anodized Large Bore 6061-T6 Aluminum Shock Body for impact and corrosion resistance as well as increased oil volume for consistent performance.- VOD (Volume Optimized Damping) features a digressive linear piston for quicker ramp-up for reduced body roll and an overall increase in damping to reduce bottom out when pushed to the limit.- Red Line high VI shock oil for consistent performance across all temperatures from -50F to 450F with anti-wear and lubricity agents.