Fabtech's new 4" crossmember systems utilize their proven heavy duty construction and design features for a robust suspension upgrade. The 4" system features high arched lower control arm crossmembers constructed of 1/4" thick steel for maximum strength. The Fabtech ductile iron steering knuckles retain the near stock track width keeping tires under the fender for a clean appearance. Rear lift is accomplished with a block and u bolt configuration.This Part Fits: Year Make Model Submodel 2015-2018 Chevrolet Silverado 2500 HD High Country 2011-2018 Chevrolet Silverado 2500 HD LT 2011-2018 Chevrolet Silverado 2500 HD LTZ 2011-2018 Chevrolet Silverado 2500 HD WT 2018 Chevrolet Silverado 3500 HD High Country 2018 Chevrolet Silverado 3500 HD LT 2018 Chevrolet Silverado 3500 HD LTZ 2018 Chevrolet Silverado 3500 HD WT 2015-2019 GMC Sierra 2500 HD Base 2011-2019 GMC Sierra 2500 HD Denali 2011-2019 GMC Sierra 2500 HD SLE 2011-2019 GMC Sierra 2500 HD SLT 2011-2014 GMC Sierra 2500 HD WT 2018-2019 GMC Sierra 3500 HD Base 2018 GMC Sierra 3500 HD Denali 2018 GMC Sierra 3500 HD SLE 2018 GMC Sierra 3500 HD SLT

The 4'' Ultimate System is available with our Uniball Upper Control Arms that feature .120'' wall 4130 Chromoly tubing with a 1.50'' OD 1'' FK Stainless PTFE Uniballs for 9'' of front wheel travel. The system also includes heavy duty ductile iron steering knuckles and forged adjusting torsion bar keys to provide the proper amount of lift without CV bind. The system will level the stance of the vehicle compared to the factory nose down rake with no change to the rear suspension. For those customers that require a factory nose down appearance an optional 1'' rear block kit is available. Uniball Upper Control Arms are available separately as an upgrade to stock, previously installed Fabtech'suspensions or other aftermarket suspension systems. Includes front 2.5 Dirt Logic Stainless Steel coil over shocks and rear 2.25 Dirt Logic Stainless Steel shocks.This Part Fits: Year Make Model Submodel 2015-2019 Chevrolet Silverado 2500 HD High Country 2011-2019 Chevrolet Silverado 2500 HD LT 2011-2019 Chevrolet Silverado 2500 HD LTZ 2011-2019 Chevrolet Silverado 2500 HD WT 2015-2019 Chevrolet Silverado 3500 HD High Country 2011-2019 Chevrolet Silverado 3500 HD LT 2011-2019 Chevrolet Silverado 3500 HD LTZ 2011-2019 Chevrolet Silverado 3500 HD WT 2015-2019 GMC Sierra 2500 HD Base 2011-2019 GMC Sierra 2500 HD Denali 2011-2019 GMC Sierra 2500 HD SLE 2011-2019 GMC Sierra 2500 HD SLT 2011-2014 GMC Sierra 2500 HD WT 2015-2019 GMC Sierra 3500 HD Base 2011-2019 GMC Sierra 3500 HD Denali 2011-2019 GMC Sierra 3500 HD SLE 2011-2019 GMC Sierra 3500 HD SLT 2011-2014 GMC Sierra 3500 HD WT

Our 4 Ultimate System provides less lift than our 6 RTS(TM) system but still allows use of 33 or 35 tall tires with cutting for street and offroad use. We have developed this system utilizing replacement upper control arms constructed of 1.50 OD .120 thick wall DOM tubing that attaches to heavy duty Fabtech ductile iron steering knuckles. The factory torsion bars remain in the stock position and use new forged adjusting keys to provide the proper amount of lift. There is no loss of ground clearance with this system as the stock lower control arms, torsion bars and front differential do not need to be relocated. This 4 Ultimate System will level the stance of the vehicle compared to the factory nose down rake with no change to the rear suspension. For those customers that require a factory nose down appearance an optional 1 rear block kit is available (2500HD Part # FTS21110) (3500HD Part # FTS21111).This Part Fits: Year Make Model Submodel 2015-2019 Chevrolet Silverado 2500 HD High Country 2011-2019 Chevrolet Silverado 2500 HD LT 2011-2019 Chevrolet Silverado 2500 HD LTZ 2011-2019 Chevrolet Silverado 2500 HD WT 2015-2019 Chevrolet Silverado 3500 HD High Country 2011-2019 Chevrolet Silverado 3500 HD LT 2011-2019 Chevrolet Silverado 3500 HD LTZ 2011-2019 Chevrolet Silverado 3500 HD WT 2015-2019 GMC Sierra 2500 HD Base 2011-2019 GMC Sierra 2500 HD Denali 2011-2019 GMC Sierra 2500 HD SLE 2011-2019 GMC Sierra 2500 HD SLT 2011-2014 GMC Sierra 2500 HD WT 2015-2019 GMC Sierra 3500 HD Base 2011-2019 GMC Sierra 3500 HD Denali 2011-2019 GMC Sierra 3500 HD SLE 2011-2019 GMC Sierra 3500 HD SLT 2011-2014 GMC Sierra 3500 HD WT

Fabtechs development capabilities are second to none with over 20 years of experience in aftermarket suspension design. State of the art software, fabrication equipment along with our seasoned engineers and fabricators allow the company to develop products that are constantly on the cutting edge. Fabtech has received numerous awards for our designs that continue to lead the market. Proper design in suspension development is key in providing a quality, trouble free product to the end consumer. Fabtech leads the industry with extensive research, design technology and rigorous testing that results in the highest performing, finest quality suspension system for the discerning offroad enthusiast.This Part Fits: Year Make Model Submodel 2015-2019 Chevrolet Silverado 2500 HD High Country 2011-2019 Chevrolet Silverado 2500 HD LT 2011-2019 Chevrolet Silverado 2500 HD LTZ 2011-2019 Chevrolet Silverado 2500 HD WT 2015-2019 Chevrolet Silverado 3500 HD High Country 2011-2019 Chevrolet Silverado 3500 HD LT 2011-2019 Chevrolet Silverado 3500 HD LTZ 2011-2019 Chevrolet Silverado 3500 HD WT 2015-2019 GMC Sierra 2500 HD Base 2011-2019 GMC Sierra 2500 HD Denali 2011-2019 GMC Sierra 2500 HD SLE 2011-2019 GMC Sierra 2500 HD SLT 2011-2014 GMC Sierra 2500 HD WT 2015-2019 GMC Sierra 3500 HD Base 2011-2019 GMC Sierra 3500 HD Denali 2011-2019 GMC Sierra 3500 HD SLE 2011-2019 GMC Sierra 3500 HD SLT 2011-2014 GMC Sierra 3500 HD WT

Fabtechs cutting edge RTS(TM) system has now been developed for the all new GM HD platform. The 6 RTS(TM) utilizes a patent pending bracket system that keep the torsion bars raised up, in the stock location. 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.. The 6 RTS(TM) system has been designed with unitized bracketry to retain the four front compression stops of the vehicle as GM intended. This distributes impact loads across a wide section of the frame rather than at a single point.High arched crossmembers and front differential skid plate are constructed of 1/4 thick steel to resist bending from hard front suspension impacts. Only 1/4 thick steel provides the rigidity and strength necessary to relocate the torsion bars, bump stops and lower control arms properly. Minimal heavy duty bracketry allow for a fast installation time with only two holes to drill and no cutting of the front diff housing. The 6 RTS(TM) system allows the use of both 18 and 20 diameter wheels.This Part Fits: Year Make Model Submodel 2015-2017 Chevrolet Silverado 2500 HD High Country 2011-2017 Chevrolet Silverado 2500 HD LT 2011-2017 Chevrolet Silverado 2500 HD LTZ 2011-2017 Chevrolet Silverado 2500 HD WT 2015-2016 Chevrolet Silverado 3500 HD High Country 2014-2016 Chevrolet Silverado 3500 HD LT 2014-2016 Chevrolet Silverado 3500 HD LTZ 2014-2016 Chevrolet Silverado 3500 HD WT 2015-2019 GMC Sierra 2500 HD Base 2011-2019 GMC Sierra 2500 HD Denali 2011-2019 GMC Sierra 2500 HD SLE 2011-2019 GMC Sierra 2500 HD SLT 2011-2014 GMC Sierra 2500 HD WT 2015-2016,2019 GMC Sierra 3500 HD Base 2014-2016 GMC Sierra 3500 HD Denali 2014-2016 GMC Sierra 3500 HD SLE 2014-2016 GMC Sierra 3500 HD SLT 2014 GMC Sierra 3500 HD WT

Fabtechs cutting edge RTS(TM) system has now been developed for the all new GM HD platform. The 6 RTS(TM) utilizes a patent pending bracket system that keep the torsion bars raised up, in the stock location. 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.. The 6 RTS(TM) system has been designed with unitized bracketry to retain the four front compression stops of the vehicle as GM intended. This distributes impact loads across a wide section of the frame rather than at a single point.High arched crossmembers and front differential skid plate are constructed of 1/4 thick steel to resist bending from hard front suspension impacts. Only 1/4 thick steel provides the rigidity and strength necessary to relocate the torsion bars, bump stops and lower control arms properly. Minimal heavy duty bracketry allow for a fast installation time with only two holes to drill and no cutting of the front diff housing. The 6 RTS(TM) system allows the use of both 18 and 20 diameter wheels.This Part Fits: Year Make Model Submodel 2015-2018 Chevrolet Silverado 2500 HD High Country 2011-2018 Chevrolet Silverado 2500 HD LT 2011-2018 Chevrolet Silverado 2500 HD LTZ 2011-2018 Chevrolet Silverado 2500 HD WT 2015-2016,2018 Chevrolet Silverado 3500 HD High Country 2014-2016,2018 Chevrolet Silverado 3500 HD LT 2014-2016,2018 Chevrolet Silverado 3500 HD LTZ 2014-2016,2018 Chevrolet Silverado 3500 HD WT 2015-2019 GMC Sierra 2500 HD Base 2011-2019 GMC Sierra 2500 HD Denali 2011-2019 GMC Sierra 2500 HD SLE 2011-2019 GMC Sierra 2500 HD SLT 2011-2014 GMC Sierra 2500 HD WT 2015-2016,2018-2019 GMC Sierra 3500 HD Base 2014-2016,2018 GMC Sierra 3500 HD Denali 2014-2016,2018 GMC Sierra 3500 HD SLE 2014-2016,2018 GMC Sierra 3500 HD SLT 2014 GMC Sierra 3500 HD WT

Fabtechs development capabilities are second to none with over 20 years of experience in aftermarket suspension design. State of the art software, fabrication equipment along with our seasoned engineers and fabricators allow the company to develop products that are constantly on the cutting edge. Fabtech has received numerous awards for our designs that continue to lead the market. Proper design in suspension development is key in providing a quality, trouble free product to the end consumer. Fabtech leads the industry with extensive research, design technology and rigorous testing that results in the highest performing, finest quality suspension system for the discerning offroad enthusiast.This Part Fits: Year Make Model Submodel 2015-2017 Chevrolet Silverado 2500 HD High Country 2011-2017 Chevrolet Silverado 2500 HD LT 2011-2017 Chevrolet Silverado 2500 HD LTZ 2011-2017 Chevrolet Silverado 2500 HD WT 2015-2017 GMC Sierra 2500 HD Base 2011-2017 GMC Sierra 2500 HD Denali 2011-2017 GMC Sierra 2500 HD SLE 2011-2017 GMC Sierra 2500 HD SLT 2011-2014 GMC Sierra 2500 HD WT

Fabtechs development capabilities are second to none with over 20 years of experience in aftermarket suspension design. State of the art software, fabrication equipment along with our seasoned engineers and fabricators allow the company to develop products that are constantly on the cutting edge. Fabtech has received numerous awards for our designs that continue to lead the market. Proper design in suspension development is key in providing a quality, trouble free product to the end consumer. Fabtech leads the industry with extensive research, design technology and rigorous testing that results in the highest performing, finest quality suspension system for the discerning offroad enthusiast.This Part Fits: Year Make Model Submodel 2015-2017 Chevrolet Silverado 2500 HD High Country 2011-2017 Chevrolet Silverado 2500 HD LT 2011-2017 Chevrolet Silverado 2500 HD LTZ 2011-2017 Chevrolet Silverado 2500 HD WT 2015-2017 Chevrolet Silverado 3500 HD High Country 2011-2017 Chevrolet Silverado 3500 HD LT 2011-2017 Chevrolet Silverado 3500 HD LTZ 2011-2017 Chevrolet Silverado 3500 HD WT 2015-2017 GMC Sierra 2500 HD Base 2011-2017 GMC Sierra 2500 HD Denali 2011-2017 GMC Sierra 2500 HD SLE 2011-2017 GMC Sierra 2500 HD SLT 2011-2014 GMC Sierra 2500 HD WT 2015-2017 GMC Sierra 3500 HD Base 2011-2017 GMC Sierra 3500 HD Denali 2011-2017 GMC Sierra 3500 HD SLE 2011-2017 GMC Sierra 3500 HD SLT 2011-2014 GMC Sierra 3500 HD WT

Experience a smoother ride and improved off-road performance with our premium Suspension Lift Component Box, designed to perfectly complement your Skyjacker Suspension Lift Kit. Built with precision, this kit provides increased ground clearance and strong handling whether you're navigating challenging trails or cruising on the highway. It’s an excellent upgrade for both 2WD and 4WD vehicles.Key Features• Contains all necessary components such as mounting hardware, steering knuckles, hydro shocks, torsion bar drop brackets, and rear blocks• Provides a smooth, factory-standard ride with enhanced off-road capability• Compatible with lift options, including a 6 in. lift for extra clearance• Engineered for durability and ease of installation; complete with detailed guidesCompatible ModelsSpecifically designed for Chevrolet Silverado and GMC Sierra HD trucks, this component box fits various trims including High Country, LT, LTZ, and WT on the Silverado 2500 HD/3500 HD, and Base, Denali, SLE, SLT, and WT on the Sierra models. For more detailed information on compatibility, please see the product page.Installation & SupportEvery kit includes all the necessary mounting hardware along with comprehensive installation instructions. If you need any help during installation or require post-installation adjustments, our team is available 24/7 to assist you.Discover additional options in our suspension lift kits collection at Suspension Lift Kits and check out our exclusive Skyjacker range at Skyjacker.