Made in the USA, Performance Shocks by CST Suspension are perfect for Lifted Trucks. Featuring urethane bushings they offer direct fitment and less noise than heim style shocks. CST Performance Shocks also feature vehicle specific valving for improved ride quality. The part number for this REAR shock is CSR-2300 and it fits 2007-2013 Chevy Silverado and GMC Sierra (all 1500 Series) models with 3" to 4" of Rear Lift. Price is PER shock. You will need to order two of these shocks if you do not already have the other one.