4" BASIC SYS W/PERF SHKS 2011-19 GM 2500HD 2WD/4WD.

Fabtech's new 4in crossmember systems utilize their proven heavy duty construction and design features for a robust suspension upgrade. The 4in system features high arched lower control arm crossmembers constructed of 1/4in 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 2015-2016,2018 Chevrolet Silverado 2500 HD High Country 2011-2016,2018 Chevrolet Silverado 2500 HD LT 2011-2016,2018 Chevrolet Silverado 2500 HD LTZ 2011-2016,2018 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 2015-2016,2018 GMC Sierra 2500 HD Base 2011-2016,2018 GMC Sierra 2500 HD Denali 2011-2016,2018 GMC Sierra 2500 HD SLE 2011-2016,20