You may or may not be aware of a major change looming for ST* classes. This major change is the result of a "clarification". The long and short of it is that almost no WRX/STi competing currently will be "legal" by this clarification. The clarification is far from clear and directly conflicts the rules governing cats/emissions/O2 sensors. If your running anything other than a stock exhaust- this directly impacts you.
Please read through this thread:
and then more importantly after you read through the thread- please write both the SEB at
and doug gill at