[LS1Formulation]

I've got a 2013 SS M6, and I just took it to the strip after a significant number of mods, but the ET is not where I feel it should be. Last year, with just a Roto-Fab cold air intake, I ran between a 13.08 and 13.25 on average, trapping about 109-111. Anywhere from a 1.97 to a 2.10 60'. I just finished installing a BTR Stage IV LS3 cam, 1 7/8" long tubes, under drive balancer and a set of 3.91 gears, and a 160° thermostat, along with a mail order tune from PCM of NC, which I know isn't optimal but I needed my car running and couldn't get a dyno tune. Took it out to the track the other day, similar weather conditions to my best runs last year, and it ran a 12.64@112.25 and a 12.65@112.70, with 1.95 60's both runs. Yes, I do know how to drive a manual, I have 3 cars and none are autos. The car just hooks and goes, absolutely zero tire spin even with a 5000 clutch dump, which seems suspicious, given that everyone I've spoken with seems to have traction problems even stock. Could my mail order tune be THAT far off? I feel like this thing should be in the bottom 12s with my mods. I will add that it was 4070 lbs. with me in it, but I still believe it should have gained more. I'd really be curious to see what other M6 cars have ran with this cam.