I don't know if I'm doing something wrong, or missing something, but I just racing modified my EK Civic Type R, and for some reason (even after re-applying all my original mods) I seem to have lost 100bhp... my Civic was at 400 before the racing modification, but now I can only get it up to 305 (I think!).
Any ideas?
Edit: Problem solved, I realized that although i still had Engine Stage 3, i had to select it and enable it... Just in case anyone has the same issue.