160 vs 180 thermostat

If it's no longer tuned "stock" ....who cares.

They stat runs open, partially or full. They open before the rating as well, the rating means 'fully open by 160'
Run the temp where the tuner manual recommends ..because it's usually so the tune doesnt cause engine damage

Enjoy.

Stat starts to open at that rating fully opened 6 to 8 degrees higher.