^^Not too sure, but I remember ppl in the past doing it and being fine till they got a tune
You shouldn't stray from the map notes on the OTS COBB maps. You can run whatever you want on the car.... but be wary and get a tune shortly thereafter. Use the OTS maps as a "limp mode" to get to a tuner. As Chris said above my previous post.... You NEED mapping done, but be careful.
Yes you can run an STI or 06/07 WRX up pipe as they are both catless and somewhat easy to find and cheaper than most aftermarket ones. And yes you can run a catless up on a stg2 setup. Most up pipes are generally the same diameter as stock, just with no cat in it.
I just installed a catless UP in my 2002 WRX. Vehicle has no other modification. Should I get it tuned? I drove it after install and seems to run fine. I wasn't looking for any more power, just didn't like the possibility of cat failure and ruining my turbo. I just bought the WRX a couple weeks ago and if it needs a tune I would probably do more mods. A tune around here cost $500.00. Thanks
Thanks for all the info! I guess I will be doing some more mods before getting it tuned though. I'll probably do STI TMI, catted down pipe and 3" cat back.
Any suggestions on a catted down pipe?