well in this case bigger is better is'nt it? if you compare the two there's some difference alright,....so i guess the OEM tb is a restriction against the XF tb.....the car did benefit from intercooler/piping/increased boost,....i wanted some idea's on the wiring if ne1 knows,..its 4 wires on the 7m, and 3 on the XF one,......cheers.