Ok I just bought a 99 SI with a B18c5 in it .... It supposible has Stage 2 comp cams in it, which the guy gave me the box with stock SI cams in it, and as of right now I can definitly hear some sort of aftermarket cams in their... Could be stage 1 or 2 don't know for sure, But my question is can I stay OBD2 and keep these cams. Cause as of right now its throwing two codes one for the O2 sensor which he told me it would, I guess cause their bad, and the other code is a air fuel incorrect mixture, I don't know if thats cause of the O2 sensor code or the cams?????????

PS- I have a VAFC sitting in my garage I could tune it with, if that would help any...................

+1 to anyone who can help at all... THANKS Turbodude06