Not sure where the base model ’21 WXR is classed. STU is for the STI (2.5L to 3.1L forced induction), but do not see where the WRX is listed. What class should I be in? STX? Thanks!
If you don’t get an answer soon, just register in your best guess. Once you get on site, if your guess was incorrect, you can put in a change slip to move to the correct class.