Wondering this myself, I'll be putting a system in this weekend, asking if I would be better off getting GT sedan pinks up front and GT wagon pinks out back (ST2033021010+ ST2038021010) to offset the additional weight from the amps/sub/dynamat etc, instead of GT sedan (ST2033021010+ ST2038021000) all the way around. Also has anybody put these on without doing the bumpstop mod, hows the ride?