The lowering springs on my Camaro are Jamex 1.5" drop. I caught these springs on a sale from BMR Production. They had bought up the remaining thirdgen f-body springs when Jamex decided to pull out of the american market sometime in 2000 if Im not mistaken.
I had just started looking for springs when I became aware of the blowout sale from BMR and jumped right on it. Can't beat a full set of quality lowering springs for $125!

The install was relatively easy (see the link to the Tech Article under the Related links) and was a major improvement both apperance and handling wise.

To all those asking where to buy these springs - as mentioned, Jamex pulled out of the US market, so if they are at all available anymore it will be in Europe. Sorry!

Note: When lowering your car you have to install an adjustable panhard rod as well - to keep your rear end centered!