







CST Performance Suspension
CST 2011-19 & 2020+ GM 2500 / 3500 | Fox 2.5 HTO Susp. System’s (4-6″)
Truck and Year
CST 2011-19 & 2020+ GM 2500 / 3500 | Fox 2.5 HTO Susp. System’s (4-6″)
2011-19 2500HD & 3500HD
MCQUEEN
190 South McQueen Road
Suite 109
Gilbert AZ 85233
United States
Description:
The latest additions to our line of Fox-Series CST Suspension Systems all include the new 2.5 Performance Series HTO shocks from Fox. These new Hydraulic Top Out (HTO) shocks provide all of the added features of a 2.5 shock at 2.0 prices, allowing us to offer CST Suspension Systems in an even more appealing price range.
CST 4-6″ Kits Include:
- CSS-C3-XX-B1 | X-Members, Diff Drops, Lift Blocks
- CSS-C3-XX-B2 | Cast Spindles
- CSS-C3-XX-B3 | Skid Plate, Torsion Brackets/Sleeves, H/W, etc.
- Fox 2.5 HTO Shocks (2 front/2 rear)
4-6″ Kit Features:
- NO NEED TO CUT/MODIFY THE FACTORY TORSION X-MEMBER
- NO NEED TO CUT/MODIFY THE FRAME NEAR THE UCA’s
- SUPERIOR CONTROL ARM, CV & TIE ROD ANGLES
- HIGH CLEARANCE, FULLY BOXED X-MEMBERS
- KITS INCLUDES STEEL LOWER SKID PLATE TO PROTECT FRONT DIFF
- INCREASED SUSPENSION TRAVEL, TIRE & GROUND CLEARANCE
- STOCK TORSION LOCATION (STL) FOR MAXIMUM GROUND CLEARANCE
- ABILITY TO RE-USE O.E. FRONT SHOCKS (KIT INCLUDES FRONT SHOCK ADAPTERS)
- GM STAILITRAK APPROVED
- PARTS COVERED IN A HIGH-QUALITY GLOSS BLACK POWDER COAT FINISH
- NO WELDING REQUIRED
- REDUCED INSTALL TIME WHEN COMPARED TO OTHER MANUFACTURERS KITS
- CAST IRON KNUCKLES
- CST SUPERIOR QUALITY FIT, FUNCTION AND FINISH
- IMPROVED HANDLING
- KIT RETAINS THE O.E. LOAD RATING/TOW CAPACITY
- ABILITY TO PUT BACK TO STOCK
- TRUE 4″ LIFT
- LEVEL STANCE WITHOUT SACRIFICING RIDE QUALITY
- 2011-19 TRUCKS PROPERLY CLEARS 35″ TIRES (at 4 inches)
- 2020+ TRUCKS PROPERLY CLEARS UP TO 37″ TIRES (at 4 inches)
- MADE IN THE U.S.A.
- CST FOX-Series KITS INCLUDE FOX SHOCKS
HTO Shock Features:
- 2.5 Impact extruded 6061-T6 alum. shock body
- Type II clear-anodized body plating
- High-flow velocity-sensitive damping
- 5/8″ hard chrome plated shaft
- Internal floating piston (IFP)
- Hydraulic Top Out (HTO) featured
- HTO reduces harsh top-outs
- HTO Increases comfort by forcing shock oil through a secondary shim stack to slow down shock shaft speed
- HTO is particularly beneficial after installing heavier, aggressive tires in lifted applications

American-made Excellence
SDHQ: Built for Adventure
Experience American-made excellence from SDHQ, your fellow off-road enthusiasts. We take pride in crafting high-quality, custom products right at our headquarters for unparalleled performance and durability.
Check out what 'SDHQ Built' means for us as well as our customers: