When I first bought my Jeep 5 years ago I put in a Napa thermostat. Believe them to be rebranded Stants. Works fine still. I did a coolant pressure test on the Jeep and getting a little dribble from behind the housing. Thinking redo the gasket, use a Felpro this time and not whatever the other Napa ones are, and give the housing a once over. Thinking just cause I am there throw in a new thermostat. Again it would be a Napa one. Kinda of rethinking that now.