Moog 5664 Coil Spring Set Powder-coated to protect against corrosion Designed to lower stresses for longer service life All coil springs are 100% load tested Worn or sagging coil springs can cause premature tire wear due to vehicle misalignment Use on General Motors products from 1983 - 1992 Spring size: Inside Diameter 4.085", Bar Diameter .765", Installed Height 10.75" Load rating: 1863 lbs. One square and one tangential end All coil springs meet or exceed OEM (original equipment manufacturers) standards