Recently Heard of a mod to the housing and doing away with the oem thermostat for generic instead.
There is a hole in the bottom of the housing that can be tapped & plugged off.
This is done to stop the leak/flow of coolant via this port and force all fluid directly via top port of the fitting.
apparantly this mod stops fluid bypassing the thermostat, thus allowing coolant to spend more time undisturbed in the radiator to cool before thermostat opens again.
housing .JPG
Your thoughts please.