Looking to put a oil filter sandwich plate on my 2011 g37x sedan seen some come in two diff. threads 1.5 or 3/4 trying to see which one I need

 

The metric one
[size=16px]M20 x 1.5mm[/size]

 

Just a heads-up, but if you are using the sandwich plate as part of an oil cooler set up on the X (AWD) you will need the plate with the angled fittings in order to make routing the lines a reasonable affair.
Here is the one i purchased.
Only issue is you will need to use bonded seal oil washers in place of the o-rings on the nipples where they mate with the adapter plate.