Just to monitor whats going on in the donk, its going to be running a flash tuner but with a custom tune made by blacktrack automotive in newcastle, so no shitty generic tunes that came with the box, no need for piggy backs or complete after market ECUs as flash tuners can do alot when it comes 2 a custom tune
But long story short the
AFR is just to keep a eye on the fuel side of things.
And the girls like the flashy lights.