Does a pressure sensor in the oil filter housing measure pressure before or after the oil cooler(s)?

 

Also interested if the sender for your OP is after the coolers or not. You obviously wouldnt see a drop in pressure if it was vefore the coolers, im just not sure where we normally tap into to get the sender in place on evo's. Which reminds me I need some gauges

 

We run a sending unit after both cores inline with the filter housing return