all parts have 2 seasons of use on them...I'd guess around 10k miles.
Ford Racing "B" Springs (rear only) $50
Firestone dual airbag setup (can be split) $80
Tokico Illumina 5 Way shocks $150
Pro3i Adj. Rear Lower Control Arms with swaybar mount, $300
HPM Double Adjustable Upper Control Arms $150
4r70w trans pan, standard depth $25