I've just checked out the part numbers for the sender and they are the same and also checked out the wiring wich is also the same and checked the fpv guages and they have a seperate wiring harness and don't interface with the pcm at all, which leaves me to beleive the only other thing that is different is the instrument cluster, obviously it is different as it has the 8000 rpm tacho to start with, so does anyone else know if this may be the reason