It really depends on which motor ....it is for , as the sr20s have differant pans and blocks de's are widder then DETs, and I am unsure of what people will want more , and I am sure the oil pick up will play some sort of role as well but I think you can get away with just upper and lower pans , posibley building just a lower pan with a larger sump and some how baffle it , but it is kinda small to work with , I think there should be a group buy , so more people can put in imput ....