This lift kit will raise your Silverado or Sierra by a true 1" in the rear. Can be installed in about 1 hour. This kit comes with 2 fabricated rear lift blocks and longer U bolts. Fabricated lift blocks will out last cast iron and will far outlast solid aluminum rear lift blocks. The rear lift blocks are also powdercoated for a long lasting finish. This kit is the strongest on the market and come with a 100% satisfaction guarantee and a lifetime warranty. It will come to you complete with all the hardware and instructions. All MotoFab lifts products are proudly made in the USA with USA sourced materials!