Quote:
Originally Posted by mike@x-ph.com
No tuning needed 
The STI downpipe issue is not present with BMWs as the BMW ECU automatically adjusts.
Jb4 or Racechip are both safe and reliable tunes, not needed for the downpipe but will add significant power |
Thanks Mike. I may be considering these soon. Did you happen to run these on the shop car with the PSI midpipe? I'd like to hear how that sounds.