Hey @bigmoose , just revisiting this. First, I don't think your highway IAT2 temps are high on the highway on a hot day. But I am interested in knowing what you did in regards to maintenance?
https://www.svtperformance.com/threads/cleaning-intercooler-while-on-car.1017776/
https://www.svtperformance.com/threads/cleaning-intercooler-while-on-car.1017776/