Tail pipe sniffers are .5 richer then taken from the cat/TP sensor location, so 13 vs 12.5afr. But thats assuming you got a good consistent pickup from the tail sniffer, sometimes they are just off. If you were getting consistency at 13 afr for each run, then your at 12.5 and thats safe for the street. At the track i would add more fuel. The leaner the afr, the higher the combustion temps are going to be, so if your rowing through the gears at WOT lap after lap, its much more crucial then a one or two gear squirt here or there on the street. That aside, 12.5afr is a pretty ideal ratio for max power. You can get away with a little leaner in the lower rpm range with this particular kit due to its lower boost in the 3-5 k range. After that it should start to richen up. I always aimed for around 12.8-13afr from 2500 to 4500-5k and then progressively started to enrich to redline where my target was 11.8-12.2afr at peak redline.

Looking at your graph though, its fuel shape is basically the opposite of what it should look like, as i described above. You actually hit above 13afr at peak so its still on the lean side, and way too rich bellow the normal vtec transition. Are you using an older kit or a newer one with the supplied fvm piggy back box for fuel/vtec/map? If so id expect the afr to be a bit more flat/consistent, but if you are not running one of these newer kits then that would explain it and you might want to pick up a vafc neo to make these correction in leaning out the fuel in the lower/mid range and lowering vtec. The engine will pull a lot better. The old comptech kits with just the rrfpr always ran a bit too rich under vtec to get enough fuel to be safe up top. your really extreme there, likely because you are running one size too small a pulley then what came with the kit stock, like an ap2 kit/pulley on your ap1?