UMI’s 1978-1996 GM B-Body bolt coilover kit installs with no welding required. It enables ride height selection as well as damping adjustment in both compression and rebound. Laser cut, Made In USA steel is jig welded to ensure a great fit on factory GM B-body axles. Kits come with popular Viking brand springs and shocks. Double shear upper and lower mounting system Upper mount requires simple drilling with common 3/8″ bit Viking brand springs and shocks US steel components 100% Made In USA