Well...I have posted on here before and been ostracized. I mostly go about on my own trusting the tuners at the local shop in my area.
I haven't modded my car a lot beyond full HID retrofit and Kartboy ST Shifter. I love my WRX but the warranty period is expired and I just ordered up the following:
COBB V3 Accessport
COBB SF Cold Air Intake
COBB Catted 3" Stainless DP (end flange tapers to a 2.5" as per specs)
COBB Turbo Heat Shield
Invidia N1 Ti Tip Dual Exit 3" CatBack
All of this cost me a pretty penny being up in Canada. I got pretty good prices though as my local tuning shop is affiliated with COBB as they come up on COBB's website of approved tuners/installers.
My tuner assured me that all this equipment i'm having put on will not require any tuning beyond the OTS tunes he will put in with AP. What do you make of this? I asked about doing a professional street tune once all the parts are on and he still was adamant that with the AP and COBB Intake and COBB CATTED DP the OTS maps will work as he has already upgraded a few 09+ WRXs. He says if I run 93 Octane the OTS maps will work just fine. I suppose if they don't work I can have it tuned after the fact...but I gotta trust my tuner. What do you think? Any 09 owners out there who have done these mods?
Also, is the taper on the DP gonna affect the installation of the 3" CatBack Invidia exhaust? My tuner put all this together for me and wasn't worried about fitment.