CSK-G23-1 20-21 Chevy / GMC HD 2500 / 3500 4wd 4″ Stage 1 Suspension System


CST is proud to announce the all new 4″ STL Suspension System for the 20-21 Chevy & GMC HD Trucks. This new kit will provide superior performance on or off road. Sub frames are designed to give you the most ground clearance while protecting vital front suspension components. The front spindles welded and fabricated from laser cut and precision materials. All of CST products are precision fabricated in house to provide strength and durability. CST Performance Suspension products are designed and manufactured in the USA!


CSK-G23-1 4″ STL Stage 1 Suspension Includes the following parts:

CSS-C3-23-B1     Front & Rear Sub Frames, Diff Drops, & Lift Blocks

CSS-C3-23-B2     Spindles

CSS-C3-23-B3     Skidplate, Torsion Brackets, Torsion Sleeves, Hardware, Etc.


Options for the 4″ Kit:

CSA-5534   DIRT Series 2.0 Emulsion Front Shock

CSA-5533      DIRT Series 2.0 Emulsion Rear Shock

CSA-6534    DIRT Series 2.0 Remote Reservoir Front Shock

CSA-6533      DIRT Series 2.0 Remote Reservoir Rear Shock

CSS-C33-4     2.0 Single Shock Mounting Kit

CSR-7523     PRO Series Remote Reservoir 14 Way Compression Adjustable Front Shocks

CSR-7524     PRO Series Piggyback 14 Way Compression Adjustable Rear Shocks

CSS-C33-9     2.5 Single Shock Mounting Kit

CSS-C29-25    Aluminum Front Skid Plate

CSS-C24-18    Heavy Duty Tie Rod Ends


Wheel & Tire Fitment

18″ Max Backspace 5.75″ 

20″ Max Backspace 6″

20×9 w/5″ Backspacing 37″ tire minor trimming

20×9 w/5″ Backspacing 35″ tire no trimming



CA Residents: WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Additional information

Weight100 lbs