bought a slightly used set of 2.5 lift springs. fed ex lost a spring. they did not have any marking so I am not sure what type of spring they were. I belive it is the rear b/c I have two that are bigger looking. on two the packs are longer. and on one the pack are contionusly got smaller as you goto the bottom. If you disagree with any of this please let me know I don't want to buy the rear if I already have 2 rears. also where is the best place to buy a single spring. I am in Alabama so also places on the east where shipping is cheaper.