If I remember correctly from reading here and else where, the Z32 has had problems with low oil pressure on the track. During long high speed high G-force right turns, the oil gets thrown to the left side exposing the oil pump pick-up. Without baffles like the SZ or EP oil pans or using an Accusump, the pump sucks air instead of oil. I think both pans were created to solve this problem. Unless your pulling high G force around a track the stock pan seems to work fine for the weekend warrior. Someone please correct me if I am miss informed.