I noticed that under the description of the lowering springs, both sets of years listed specify "hardtop." Does that mean these can't be used on a convertible? If that's the case, what's different about convertibles that prevents these springs from being used?
You can use the springs on convertibles as well, however the convertibles are heavier than the "hardtop" models which will cause it to sit lower than the advertised rate. That is the only difference in the applications.