S.T.L. High Clearance LIFT KIT | 2011-2018 GM 2500HD | 6-8" STAGE 2

Superior fit, function and finish. Improved ride quality, O.E. steering geometry, O.E. CV angles, O.E. track-width, that’s just a few of the many reasons we are known as the 2500HD guys. You could also say we paved the way for sub-frame style lift kits, twenty years ago and long before the current trend. Fifteen years later, like the 2500HD our lift kits are still evolving and still continue to uphold our reputation! Our 6-8" S.T.L. (Stock Torsion Location) kit uses a one piece sub-frame, fabricated steering knuckles, steering drop down and will retain the factory handling!

We've incorporated our experience in off road racing and 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 S.T.L. (Stock Torsion Location) 6-8" adjustable kit will include our one-piece gusseted sub-frame with a steel full size differential skid plate, fabricated steel, CNC machined front steering knuckles, high strength steering drop center-link with heim jointed support links to minimize wear of the factory idler and pitman arms, differential drop brackets, heavy duty bump stop brackets, extended sway bar end links, brake line drop brackets, all of the necessary install hardware, and O.E. front shock extensions. This kit also includes our hand built S.T.L. front brackets, allowing you to keep the torsion x-member in the stock location!

The rear kit includes CST Street-Series shocks fabricated 4" lift blocks with bump stop pads and heavy duty 3/4" zinc-plated u-bolts.

Steering stabilizer brackets are built into the kit and our stabilizer shock kit can be purchased as an upgrade option.

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 trucks stability assist features including the GM Stabilitrak system.

S.T.L. Kit Features

6-8" ADJUSTABLE FRONT LIFT HEIGHT.
ALL CST SUB-FRAME STYLE LIFT KITS INCLUDE A NEW CENTER-LINK WITH HEIM SUPPORTS OFF OF THE SUB-FRAME TO REDUCE WEAR & TEAR AND ADD STABILITY TO THE O.E. IDLER AND PITMAN ARMS!
SUPERB CV ANGLES!
HIGH CLEARANCE SUB-FRAME!
STOCK TORSION CROSS MEMBER LOCATION (S.T.L.) FOR MAXIMUM GROUND CLEARANCE!
INCREASED TIRE CLEARANCE.
FACTORY TRACK WIDTH.
CONSTRUCTED OF 1/4" OR THICKER STEEL FOR EXTREME STRENGTH!
NO GM STABILITRACK ISSUES.
PARTS COVERED IN A HIGH QUALITY TWO-STAGE GLOSS BLACK POWDER COAT FINISH!
NO WELDING REQUIRED.
SPINDLES ARE CONSTRUCTED OF PRECISION LASER CUT ¼” OR THICKER STEEL WITH CNC MACHINED BALL JOINT TAPERS, AND THAN COMPLETELY MIG WELDED!
FACTORY SPARE TIRE CAN BE USED ON 18" WHEELS
QUALITY FIT, FUNCTION, AND APPEARANCE.
IMPROVED RIDE FROM FACTORY!
ABILITY TO BE PUT BACK TO STOCK.
OPTIONAL FRONT STEERING STABILIZER.
MADE IN THE U.S.A.

Notes & Fitment

TORSION KEYS REQUIRED FOR 7 or 8" LIFT!
5.25" MAX BACK-SPACING ON 17-18" WHEELS.
5.75" MAX BACK-SPACING ON 20" & LARGER WHEELS.
KIT INCLUDES SHOCK RELOCATOR TO RE-USE O.E. FRONT SHOCKS!
SOME MODELS MAY NEED ADDITIONAL REAR LIFT COMPONENTS FOR TRUCK TO BE COMPLETELY LEVEL AT 8" ADJUSTMENT.
KIT WILL FIT ON 35OO MODELS BUT MAY REQUIRE ADDITIONAL PARTS.

Optional & UPGRADE Parts

OPCSK-C13-3 | FORGED TORSION KEYS (REQ. FOR 8" OF LIFT)

OPCSS-C33-4 | SINGLE (FRONT) SHOCK BRACKETS (REQUIRED TO RUN CST 2.0 SHOCKS IN THE FRONT)
OPCSR-6521B | CST DIRT-SERIES FRONT SHOCK 2.0 WITH RES. (2 REQUIRED / ORDER WITH CSTCSS-C33-4)

OPCSS-C5-7 | DUAL SHOCK BRACKETS (REQ. 2 OF EA. / CSTCSR-6521 & CSTCSR-6522)
OPCSR-6521 | DIRT-SERIES FRONT SHOCK 2.0 RES. (STOCK LOCATION)
OPCSR-6522 | DIRT-SERIES FRONT SHOCK 2.0 RES. (DUAL LOCATION)

OPCSR-6526 | DIRT-SERIES REAR SHOCK 2.0 W/ RESERVOIR (2011-2018 6-8")
OPCSR-A27-1 | BILLET RES. CLAMPS (ORDER 1 PER SHOCK)
OPCSR-A27-2 | BILLET (BLACK) RES. CLAMPS (ORDER 1 PER SHOCK)
OPCSR-2946 | CST PERFORMANCE STEERING STABALIZER (FITS 6-8" KITS)
OPCSS-C2-10 | CST DIRT-SERIES UNI-BALL UPPER ARMS (CLOSED CUP)
OPCSS-C28-3 | 2011-2016 2500HD CARRIER BEARING SPACER
OPCSL-C19-1 | 6.5" REAR LEAF SPRINGS (PAIR - REQUIRES ADDITIONAL PARTS)
OPCSB-C14-7 | 1" BLOCK & SPRING PLATE KIT (REQUIRED W/ LEAF SPRINGS)
OPCSU-C15-11HD | REAR U-BOLT KIT (REQUIRED W/ LEAF SPRINGS)
OPCSP-C28-1 | 2011-16 6.6L (4WD) CV FRONT DRIVESHAFT (REQUIRES SHIFT LINKAGE)
OPCSS-C22-8 | SHIFT LINKAGE BRACKET 2011-2015 HD 4WD
OPCSS-C29-15 | ALUMINUM SKID PLATE W/ CST LOGO (2011-18 HD W/ 6-8" LIFT)
OPCSR-55XX | DIRT-SERIES 2.0 EMULSION SHOCKS NOW IN STOCK, CALL FOR DETAILS!
OPCSS-C29-16 | DEF SKID-PLATE (2011-16)
OPCSS-C24-16 | GEN III EXTREME-DUTY TIE-RODS

KIT COMPONENT BREAKDOWN

OPCSS-C3-17-B1 / QTY 1

OPCSS-C3-17-B2 / QTY 1

OPCSS-C3-17-B3 / QTY 1

OPCSR-2500 / QTY 2

SUGGESTED WHEEL & TIRE SIZES

(Factory / OEM wheels and tires will work with the lift kit installed)
Wheels for use with oversized tires -
17 x 8" or 9" w/ 5 1/4" BS
18 x 9" w/ 5 1/4" BS
20 x 9" or 10" w/ 5 3/4" BS
(some higher offset wheels may work....test fitment required)
Tire sizes for use on factory O.E. or aftermarket 20" wheels
35 x 12.50
37 x 12.50 or 13.50 (trimming required - must be set to 8" of lift)

SUGGESTED TIRE SIZES

Suspension set at 6” of lift / torsions at stock adjustment.

35” x12.5” OR SIMILAR ON 8” WIDE WHEELS
315 / 70 / 17 ON 8 OR 9” WIDE WHEELS
35” X12.5” ON 9 or 10” WIDE WHEELS (MINOR TRIMMING REQUIRED)
ANYTHING LARGER, TALLER OR WIDER IS BEYOND CST RECOMMENDATIONS AND UP TO THE INSTALLER.

MAXIMUM BACKSPACING VARIES BY RIM SIZE (see above)

ADDITIONAL KIT NUMBERS AVAILABLE THRU DISTRIBUTORS

Stage One S.T.L. 6-8” | OPCSK-C3-17-1 | NO SHOCKS, INCLUDES BRACKETS TO RE-USE O.E. FRONT SHOCKS. REAR SHOCKS CAN BE PURCHASED SEPARATELY.

Stage Two S.T.L. 6-8” | OPCSK-C3-17-2 | INCLUDES BRACKETS TO RE-USE O.E. FRONT SHOCKS, ALSO INCLUDES CST MONO-TUBE STREET-SERIES REAR SHOCKS.

Stage Three S.T.L. 6-8” |OPCSK-C3-17-3 | KIT INCLUDES 4 CST DIRT-SERIES 2.0 EMULSION SHOCKS (NON RESERVOIR) AND FRONT SINGLE 2.0 SHOCK MOUNTS.

Stage Four S.T.L. 6-8” | OPCSK-C3-17-4 | KIT INCLUDES 4 CST DIRT-SERIES 2.0 RESERVOIR SHOCKS AND FRONT 2.0 SINGLE SHOCK MOUNTS.

Stage Five S.T.L. 6-8” | OPCSK-C3-17-6 | KIT INCLUDES 6 CST DIRT-SERIES 2.0 RESERVOIR SHOCKS AND FRONT 2.0 DUAL SHOCK MOUNTS.

OVPRO #: OPCSK-C3-17-2