Moog 638 CV Tube Weld Yoke Machined bodies to meet the tight tolerances Forged and cast material to meet the performance requirement Minimize the flash lines for less interference Cleaning process induces compressive strength for increased performance Machined and threaded holes for mounting ease Use on General Motors products from 1955 - 1972 Spring size: Inside Diameter 3.63", Bar Diameter .625", Installed Height 11.13" Load rating: 1726 lbs. Tangential ends All coil springs meet or exceed OEM (original equipment manufacturers) standards