Moog 8621 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 Fits select 1979 - 1983 Ford and Chrysler vehicles Spring size: Inside Diameter 4.021", Bar Diameter .531", Installed Height 9.5" Load rating: 580 lbs. One square and one pigtail end All coil springs meet or exceed OEM (original equipment manufacturers) standards