These spring kits have been designed to lower your 1979 to 2004 Mustang and improve its handling It will also work on 1999 to 2001 cobras There will be some deterioration in ride quality and the height on some cars will vary The kit will lower V-8 front, 875 and 1994 - 2004 Mustangs up to 1 18-inch It will also lower V-8 rear, 5 and 1994 to 2004 models up to 34-inch Spring rates for the front is 650 and the rear is 200300