I bought springs from ESPO (mistake). I got the 5 leafs for the rear and new springs for the front. They must think Firebirds wiegh about 5000lbs. My car sat like a 4wd when I first put them in. I did have to send the front springs back and get some different ones because the front of the car would not go down at all. It still sits too high even with the second set they sent me. I have a couple used sets of springs I will try when time permits. Also will either try to remove a leaf from the rear or buy a set of 4leafs. This picture is a little deceptive though, the front tires are pretty short (25") while the ET Streets on back are tall (28.5").