Product information updated on 2021-08-25, Manufactured by BDS Suspension - Part Number BDS:121151, 2007 to 2018 Silverado/Sierra 1500 Replacement upper control arm Kit, Fits all 2007 to 2013 models and 2014 to 2018 models with cast steel control arms, BDS Suspension designs the packaging for their lift kits in the most efficient way possible. This means splitting lift kits into various kit boxes to enable them to be shipped easily and also so that you can mix and match kit boxes and assemble them into a variety of different lift styles. This part is on box of a complete lift kit and generally is not ordered by itself as several other boxes are required in order to make a complete BDS lift kit.