I was going to get the safc because after a dyno session I found that my car runs really rich 11.8-11.4 wot and 10.8-10.3 with N20, but was wondering if the unit shows AFR or woul I still need to get a gauge to see the AFR. thanks

 

No it doesnt. The way you tune the SAFC is by going to a dyno with either a wideband or a tail sniffer. Check where the a/f is, and tune it between the runs.