It is Located under the throttle body area.
If you follow the top radiator hose(on the drivers side) it leads right down to it.
You will need to remove the air intake tube to get to it.
Might have to lossen or remove the exhaust crossover heat shield to get to the two bolts.
Pretty sure they are 13mm botls on the thermostat housing.
Heres a pic of that location, you 3.1 may look a little different but its in the same spot.
thermo housing