Hi, I have recently installed apexi power fc when doing auto-manual swap in my b16a5 civic sir. Can has been tuned on dyno bu professional tuner. I trust them 100% but it's always good to het second opinion. Since I don't know much about tuning, can anyone plz comment in particular on the air/fuel ratio! I have apr guage and in most occasions shows lean. Not sure how precise they are. Many thanks