This high quality 6" lift kit for the GMC Sierra and Chevy Silverado 3500HD has been designed to improve the offroad capability of the vehicle while providing a smooth highway ride. The Fabtech lift kit retains the factory load carrying capacity of the vehicle that is perfect for owners that use their truck for towing and hauling. The heart of this lift kit is Fabtechs cutting edge RTS design. The RTS is a bracket system that keeps the torsion bars in the factory location while providing lift. This feature provides superior ground clearance at the frame as there are no torsion bars hanging down to become high centered on or damaged when offroading. It provides a very clean appearance to the vehicle. Another important aspect of this GM 3500HD lift kit is the lower control arm crossmembers. They are arched at the bottom to provide ground clearance and have a skid plate to protect the front differential against offroad obstacles. The crossmembers and bracketry are built with 1/4" thick steel that provides strength and rigidity to the vehicles suspension. The superior build quality and design of the components allows for a fast installation time with only four holes to drill and no cutting of the front diff housing. This heavy duty GMC Sierra and Chevy Silverado 3500HD lift kit is built with the highest quality components and is designed to provide years of trouble free service while offering a great ride. FEATURES: Torsion bars remain in the factory frame location for maximum ground clearance. RTS Torsion bar brackets index the bars at factory setting for a smooth ride. Heavy duty bracketry constructed of 1/4" thick steel for additional suspension strength. Near factory track width helps keep tires under the fenders. Front & Rear bump stop brackets eliminate over cycling of suspension. CROSSMEMBERS: 1/4" thick steel lower control arm Crossmembers are arched for maximum ground clearance. The welded box design of these Crossmembers provides additional st. When you're ready to run 37" tires on your Raptor and have the ultimate shock system to go with it then this is the kit for you. The lift features heavy duty ductile iron steering knuckles designed to handle 37" tall tires with the vehicle's ESC (electronic stability control) and Traction Control. Typically, 37" tires will cause steering and brake issues on the factory Ford steering knuckles. Fabtech knuckles are designed for the oversized tires and will provide years of trouble free service. The lower Raptor control arms are relocated with 1/4" thick steel Crossmembers and comes with a 1/4" thick steel differential skid plate. To keep the front CV angles proper with the new ride height, the front differential is relocated down between the crossmembers for smooth 4WD operation. The front Raptor shocks are replaced with Dirt Logic 3.0 Coilovers that feature a remote reservoir compression adjuster. This allows for a compliant highway ride with the ability to adjust the compression damping for aggressive offroad use. The rear Dirt Logic 3.0 Bypass shocks allow for 12" of wheel travel with two compression adjusters and one rebound adjuster for total damping control. The Dirt Logic 3.0 shocks will provide a noticeable increase in damping for Raptor owners looking to take their vehicle to the next level in suspension performance.. TIRE SIZE - 37/12.5R18 WHEEL - 18X9 W/5 3/4" BS W/MINOR TRIMMING; TIRE SIZE - 37/12.5R20 WHEEL - 20X9 W/5 3/4" BS W/MINOR TRIMMING; TIRE SIZE - 37/12.5R22 WHEEL - 22X9 W/5 3/4" BS W/MINOR TRIMMING; 14. CAN NOT USE OEM WHEEL AND TIRE.; 20. DOES NOT FIT STANDARD CAB MODELS.; 167. DIESEL MODELS ONLY.; 199. DOES NOT FIT GMC AT4 OR CHEVY TRAIL BOSS MODELS. Lift Kit; 6 in. Lift; w/Stealth Shocks; For PN[FTS21277/FTS21278/FTS21280/FTS6358/FTS6240];. Fabtech 2020 GM 3500HD 4WD 6in Lift System w/ Stealth Shocks. 6" RTS SYS W/STEALTH 2020-21 GM 3500HD 4WD. 6" RTS SYS W/STEALTH. Suspension Lift Kit. LftKt-Suspw/Shock. Lift Kit

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