[Kracka]

Dropzone springs are pretty crappy. You will be much better off saving an additional $50-100 and getting something decent. For cheap, yet good, springs, look towards Progress or Sprint. Are you lowering the car for handing? Looks? Combination of both? For an install, figure a few hours of shop labor. It really isn't too tough, you'll just need to rent a spring compressor (Autozone free, Checker a few $$$). Be sure to get some new aftermarket shocks as well, lowering the car on stock shocks is a bad idea.