I have a 08wrx with a tp stg1 map with a target boost of 16.5 psi. I have had the map installed for several months without any issues.
Today while on the the freeway, I was consistantly hitting 18psi in 4th and 5th.
Then on the drive back home, it was back to normal.
Im just curious what could be the cause of this. Is it something I should be concerned about?