First off, these things are fast.....ran a 1:44.5 at PCA Road Atlanta this weekend and there was certainly more in them.

Now the bad....
Two tires developed a delaminating band around the outside edge, almost a cording look but they had 10 heat cycles and were not worn at all. Right side rear had developed a split at Roebling three weeks earlier so they were swapped and it "healed" itself. Unfortunately a split occured much much deeper which I would say cannot be healed. At least I won't go out on the tire.

I was absolutely anal retentive about making sure everything was mounted and bolted up properly. Pressures were all well in specification Camber was 2.5F/2.1R Toe at zero front and rear 1/16th. Didn't write down date code but I bought them from Tire Rack in December.

Ambient temperature was about 50

10 heat cycles to failure seems premature. Split occurred on Passenger side rear both times.

What were your hot pressures?

39/40

Brent, that is a rockin' time at RA!

Pressures seem right.
Camber on the front is less than we typically run, but not far off

Please get those tires back to Toyo for them to look at.
Post some pictures so we can know what to look for.