rough country 6" lift kit (fits) 2019-2021 chevy silverado 1500 | n3 shocks | knuckle suspension system | 21731 rough country features an impressive all-new design that's built from the ground up, with aggressive angles and head-turning stylings that fit in beautifully when transformed with rough country's 6" suspension lift. this kit lifts and levels your vehicle for a commanding stance and enough clearance to run 35x12.50 tires on 10" wide wheels. rough country has engineered this kit to provide optimal suspension geometry while retaining the factory ride quality, giving you enhanced off-road capabilities without sacrificing the handling and smooth ride that makes this truck so impressive. rough country's 6" suspension lift retains the stock track width, allowing for up to a 10" wide wheel with 4.5" backspacing. each kit includes front and rear crossmembers and a skid plate for enhanced chassis strength as well as cast steel knuckles for incredible durability and performance. n3 rear shocks offer a smooth stock-like ride. backed by rough country's lifetime replacement guarantee! 3 years on shocks/struts. items included: front: lifted knuckles- front crossmember- rear crossmember- upper strut spacers- differential drop brackets- differential skid plate- sway bar drop brackets- hardware- rear: fabricated lift blocks- brake line brackets- ubolts- hardware- (2) n3 shocks does not work w/ sierra (gmc part #22931), trailboss (part #27531) or 19' classic models. 20" or larger aftermarket wheels with 4.5" of backspacing is required.