This alloy weld in top/bottom plate and screws are the same design in the Aeroflow Performance EFI pump compact surge tanks AF77-3244.This will allow the user to custom make a surge tank to suit their specific application. The user can choose between running the Bosch style 044 fuel pump (AF49-1014) or use our 40mm conversion fuel pump hanger (AF59-5244BLK) for the smaller40mm internal fuel pumps.