ne one go with a AFC instead of chippin it like gettin it done by technosquare?

 

An Air/Fuel controller? Search "reflash" or "tune" or "engine AND management" (in boolean mode)

UTEC is one option - but it can do more than AFR.

Also there is a new unit from Cobb Tuning which is almost completed for the G35.

Or you have an option like UpRev's Osiris which includes Cipher diagnostic software. Presently it's not end-user tunable, but is rumored to be in the near future.

But most importantly, SEARCH