Drop Zone sells all their stuff really cheap, especially shocks and struts. It seems like something would have to be compromised to sell them at such low prices. i'd be a little apprehensive until i've seen a long term test that indicates otherwise.
never EVER buy dropzone spring. i have them on my car now (only because i have yet to purchase my tein suspension kit) the raised my car about 1/2 inch in the rear, and no change in the front. the fitting sucked, the red is gay, my ride quality is horrible....don't buy these springs.
oh yeah, did i mention not to EVER buy these springs??