I have an 07 WRX as follows:
Perrin FMIC with short ram and AVO 50/50 (that I'm going to make a cover so it's full recirculating, so hold the comments)
Open sourced tuned
Running wastegate pressure (whatever that means....tuner who checked the tune and did the PPI for me made that change to take it down a notch)
What I want to to: Replace the entire turboback with an 07 STi exhaust.
What I want to know: Can I assume that this will be safe?
Why the hell would I do this? I've taken posession of the car for reasons you don't need to know and I have no desire for more power and all that noise and have the full oem exhaust, so it's an easy thing for me to do.
If it's safe to do without a retune, I'll do it. If not, I won't and will concentrate on other things to un-teenager the car.