OFAC will plug in, just recently ive had my doubts about the wiring configuration of an OFAC loom though, i have compared 3i & OFAB looms but ive not had an OFAC one in my hands, theres a possibility there may be a pin change needed to make a 3i loom OFAC but its nothing major, im still researching into it.

All the other sensors are the same with the exception of the FRST Inlet Air Temp (IAT) sensor.

OFAC isn't really that much different, the benefit with OFAB is it uses a Marelli MAP sensor so you can upgrade to a 3 bar