I should do a log with an without the box in place but I have a log on open right now of a 1st to 4th gear pull and the highest the GM IAT logged was 69F. While cruising it was around 53F, temps where in the high 40F's here today.

1997 Eclipse GST - AWD swapped - TPC - GT Spec powered
2023 - 9.63 - 145mph