Originally Posted by 04scoobywrxwagon
Ok sweet then ill deal with the cel til they take it off, I hate having a cel on so it'll bother the shiz out of me and motivate me to go get a proper tune sooner, will hitting any decent amount of boost before I get the tune hurt anything?
Forget the O2 sensor spacer and that EGT resistor. You have an AP. Install ATR and mask out the rear O2 and uppipe EGT related faults on the OTS Cobb map. Drive cautiously on the OTR map. I still highly suggest not putting off the actual tune.
Do the uppipe before the tune at that shop. Like mentioned before a good used STI, 2006-07 WRX uppipe, or any reputable aftermarket one will be fine. If it has a flex joint in it, do not overwrap that portion.