Doesn't require a tune update, but it'll help. With the stock thermostat you've got a target coolant temp of 210 with fans barely kicking on at 202, then no ramping up more until 214, then 220.
This 170° thermostat will be open all the way by 185 and that will be our target temp with fans set to help maintain that. The resulting lower cylinder temps would then unlock the advanced ignition timing the tune is already setup to deliver in cooler temps.