Hey, greeting from Kansas everyone. So I bought a 2016 STI the other day and the guy before me had a Cobb SF intake, ETS extreme cat back and a Cobb accessport currently running 91 Stage two. My question, is it safe to run a stage two like that with no fuel upgrades and with a stock down pipe? Or should I just run that 91+SF? I would rather not mess up my car. Any advice is very much appreciated.