I don't know about 100% of anybody, but I'm pretty sure the up-pipe bung is for the stock EGT, and if it has two, for an aftermarket EGT gauge. I agree that it may well be to hot, especially while tunning in the uppipe. With a 1300 degree max, that is cutting it awful close.
The extra foot of pipe, and the mass of the turbo probably drop the temps by 100 degrees or so I would think.
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