First post? Welcome to the Club! :wave:
Accessport, then catted downpipe would be perfect. The GrimmSpeed AOS is not the best choice. I had one.
Yes, the downpipe should be done along with the "stage 2 + intake" ECU calibration. After that, IMO, focus should be on cornering and braking. Good tires, good brake pads with SS lines and fluid change. Good springs and dampers with swaybars after (the 2014 WRX suspension is quite poor from the factory -- this is a big area for improvement).
I am concerned that you are currently running the OEM ECU calibration with the Cobb intake. This should not be the case. You should replace with the stock intake until you are able to resolve this discrepancy.
(All Years) Grimmspeed AOS Condensation Issue - Subaru Forester Owners Forumwhy the grimmspeed aos is not the best option?
Sent from my SM-G610F using Tapatalk
Yep, that and it is not recommended for autox or track days. I installed a Crawford AOS. Had to give up cruise control - which I rarely used anyway.
