Fabtech 14-18 GM C/K1500 w/OE Alum. UCA 4in Basic System w/Perf. Shocks

Fabtech's new 4" crossmember systems utilize their proven heavy duty construction and design features found in their 6" systems but with less lift for use with 33" tall tires. These 4" systems feature high arched lower control arm crossmembers constructed of 1/4" thick steel for maximum strength. The Fabtech ductile iron steering knuckles retain the stock track width keeping tires under the fender for a clean appearance. Rear lift is accomplished with a block and u-bolt configuration. The Basic System includes front coilover spacers that utilize the factory Coilover shocks. Rear shock options include Performance or Stealth monotube shocks. Performance Lift System w/Shocks; 4 in. Lift; w/Rear Performance Shocks; TIRE SIZE - 33/12.50R17 WHEEL - 17X8 W/4 1/2" BS W/MINOR TRIMMING; TIRE SIZE - 275/65R18 WHEEL - 18X8 W/4 1/2" BS W/MINOR TRIMMING; TIRE SIZE - 295/55R20 WHEEL - 20X9 W/5" BS W/MINOR TRIMMING; 8. WILL NOT FIT ALL WHEEL DRIVE MODELS.; 14. CAN NOT USE OEM WHEEL AND TIRE.; 17. DOES NOT FIT STANDARD CAB.; 129. FOR USE ON VEHICLES WITH POWER STEERING ONLY.; 166. WILL NOT FIT MODELS WITH FACTORY MAGNERIDE SHOCKS. Fitment: Chevrolet Silverado 1500 Custom 2016 to 2018 Chevrolet Silverado 1500 High Country 2014 to 2018 Chevrolet Silverado 1500 LS 2015 to 2018 Chevrolet Silverado 1500 LT 2014 to 2018 Chevrolet Silverado 1500 LTZ 2014 to 2018 Chevrolet Silverado 1500 SSV 2015 to 2018 Chevrolet Silverado 1500 WT 2014 to 2018 GMC Sierra 1500 Base 2014 to 2018 GMC Sierra 1500 Denali 2014 to 2018 GMC Sierra 1500 SLE 2014 to 2018 GMC Sierra 1500 SLT 2014 to 2018