Not sure of the size, but there appears to be 2 different injectors on that setup: 81271 & 81184
That would be enough for me to pull them out and start wondering . . . . .
I've googled the numbers and haven't found anything. I'm going to call precision and see if they can look it up from there.
hopefully they are all the same even though the numbers are different haah...
EDIT: I just called precision and they need a part number that can be found by popping the electrical connection off. Does anything have to be done before i pop this connection off like disconnecting the battery?