Moog 5665 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 1982 - 1991 Spring size: Inside Diameter 4.3", Bar Diameter .485", Installed Height 10" Load rating: 580 lbs. One tangential and one pigtail end All coil springs meet or exceed OEM (original equipment manufacturers) standards