To be thorough, you should look at springs, dampers, and an adjustable panhard bar. Many people have used lowering springs with stock dampers, but you may not be happy with the ride quality. If you do lower the car, then your rear axle MAY need to be re-centered with a panhard bar. You can always do the drop, then measure where your rear end is, and decide.
There are a ton of threads on this stuff, read a bit on the S197 forums and you'll get good info on what to expect from various mods.
There are a ton of threads on this stuff, read a bit on the S197 forums and you'll get good info on what to expect from various mods.