^^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.
2002 WRX Sold
2007 WRX Sold
2007 STi totaled
2007 Foz XT sold
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?