CST Performance Suspension STL High Clearance 4-6" Stage 5 Suspension System

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Sku : CSK-G18-5

This adjustable 4 to 6-inch S.T.L. (Stock Torsion Location) High Clearance design for the 11-19 Chevy / GMC HD trucks provides the “leveled look” without sacrificing the ride quality or function. We’ve combined our experience in off-road racing with trophy truck quality engineering to ensure that your suspension will have increased strength, performance, overall build integrity and perform better than stock. Throughout the initial design and R&D process, we made sure to retain the factory O.E. suspension geometry and design attributes!

This adjustable kit includes gusseted high clearance cross-members with a full-size differential skid plate, cast-iron / CNC machined front steering knuckles, differential drop brackets, heavy-duty bump stop brackets, extended sway bar end links, brake line drop brackets, all necessary install hardware, and O.E. front shock extensions. This stage 4 kit also includes four 2.0 reservoir shocks. Steering stabilizer brackets are built into the kit and our stabilizer shock kit can be purchased as an optional upgrade. For the rear, this 4-6″ kit includes BILLET 1″ lift blocks and heavy-duty, zinc-plated u-bolts.

No cutting of the front differential is required or welding of any kind to install this kit. Retaining the factory front wheel track width allows this kit to work perfectly with all of the truck's stability assist features including the GM StabiliTrak system.


  • 4-6" Adjustable lift height (Level stance at 4 inches of lift with 1" Rear Blocks Installed)
  • Stock ride and handling
  • Superior CV & Tie-Rod angles
  • High Clearance, fully-boxed x-members
  • Kit includes steel lower skid-plate to protect the front diff.
  • Stock torsion location (STL) for maximum ground clearance
  • Increased tire clearance
  • Overall track width remains near the factory
  • Ability to re-use OE shocks (Kit includes front shock adapters)
  • GM Stabilitrak approved
  • Parts covered in a high-quality gloss black powder coat finish
  • No welding required
  • Kit includes four CST 2.0 Aluminum-body rebuildable shocks
  • Cast-Iron Spindles made and machined in the USA
  • CST superior quality fit, function, and appearance
  • Improved handling
  • Ability to be put back to stock
  • Made in the USA


  • Torsion keys are required for 5-6 inches of lift
  • Additional rear lift required for level stance when keys are added
  • Some models may need additional rear lift components for a truck to be completely level at 4"
  • The kit will fit on 3500 models but may require additional parts, u-bolts will need to be longer 

This warranty covers the original retail purchaser of a CST product or suspension system for a light truck or sport utility vehicle, who owns the vehicle the products were originally installed on in the United States of America and Canada.


This warranty covers all products manufactured by CST Performance Suspension for light trucks or sport utility vehicles. The warranty covers parts from defects in material or manufacturer defect under normal use as long as the original purchaser owns the vehicle.


Products manufactured by CST Performance Suspension are not covered for finish, alterations, modifications, when used in races, competition or similar activities, incorrectly installed, damaged product subject to accident, fire, corrosion, negligence, abuse, misuse, or when used on police, taxi, race, government or commercial vehicles. Warranty coverage does not include consumer opinions about such areas as ride comfort, fitment, and design. Products used in applications other than the recommended or intended use on the current CST Performance Suspension WEB-catalog or in the Instructions accompanying the product will not be covered.


Bushings, Polyurethane or Delrin components, Bumpstops, Ball joint parts, Tie rod ends, Heim Joints, Uniballs, U-Joints, Shocks, Shock Seals or any part of the vehicle the product was installed on. Components used in or on CST suspension systems that are consumable or subject to wear are not considered defective when worn.


Any and all costs of removal, installation or re-installation, freight charges to and from CST, incidental or consequential damages, rental vehicles or time loss.


CST Performance Suspension will repair or replace the defective products at our discretion, in a timely manner.


HOW YOU (THE CUSTOMER) CAN GET SERVICE; Contact your CST dealer or CST Performance Suspension about the problem prior to removing the product from the vehicle.
If the product appears to be covered by our warranty, you will be given a Return Authorization Number (RA#) and asked to return the product. (YOU MUST RETURN THE PRODUCT WITH A COPY OF THE ORIGINAL INVOICE AND THE RA#). If the product is found to be covered by the warranty it will be repaired or replaced and returned to you or your dealer. If a replacement part is needed before the product can be returned you can purchase the replacement part. When the defective product is returned, CST will determine if the product in question is covered under the warranty. If the part would be replaced you will be credited or refunded your cost, if the part would be repaired your Refund will be prorated at CST’s discretion.


This warranty is made in lieu of all other warranties, expressed or implied, including but not limited to the implied warranties. Neither CST Performance Suspension nor anyone else who has been involved in the sale or delivery of this product shall be liable for any direct, indirect, incidental, special or consequential damages (including damages for loss of profits, revenue or business and the like) in any way related to the product. The foregoing language cannot be waived, modified, or supplemented in any manner whatsoever except by a written letter signed by officers of CST Performance Suspension.