They lower the car .2" in front and .7" in the rear. Stiffer to reduce brake dive and body roll. They state it "will greatly improve your Boss 302's overall weight distribution". So who's going to be the first to try them? Maybe me.
http://www.steeda.com/store/boss-performance-lowering-springs.html
http://www.steeda.com/store/boss-performance-lowering-springs.html