i once done an mfi to efi conversion on one of my old s2's, all i done was put a wireing loom from out of an efi xr3i and modified the connections to the edis4 module and ecu connector and run the ofab ecu, the car ran like a dream and thanks to the lack of the air flap off the metering head i gained the lovely chatter from the turbo on de-exceleration