Fabtech 4" BASIC SYS W/PERF SHKS 2011-19 GM 3500HD 2WD/4WD K1123

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.

TIRE SIZE - 35/13.50R18 WHEEL - 18X9 W/5 3/4" BS W/MINOR TRIMMING; TIRE SIZE - 35/13.50R20 WHEEL - 20X9 W/5 3/4" BS W/MINOR TRIMMING; 14. CAN NOT USE OEM WHEEL AND TIRE.; 60. FITS EXTENDED AND CREW CAB MODELS ONLY.; 55. MUST USE AFTERMARKET 18 IN. WHEELS OR LARGER.