Approximate lowering values from stock at highest ride height setting: .8" Front, 1.6" Rear Approximate lowering values from stock at lowest ride height setting: 2.5" Front, 2.6" Rear Lowering amounts are approximate. We determined these lowering amounts by installing this spring set on our 2005 Mustang GT. All before-and-after measurements were done with a full tank of gas and the tire pressures set to 32 PSI. * note actual product may differ from photo