When I talked to brad, he told me the fronts are 9.5" 500lb springs, (by afco racing) with a 5.5" od. and the rears are 9.5" 650lb springs with a 5" od. (also by afco) The adjuster in the rear is a threaded cup made by afco. As for the front, it is something he apparently madewhich basically has two cups, on a threaded rod with a half inch drive to turn them. The front is hard to explain, ill grab pics since mine is in pieces anyway.