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I'd suspect the exhausr roses, being such a big diameter, would not suffer much from over tensioning. It's the loosening off/rattling/vibrations that seem to damage the head threads. I have more concern on smaller fittings, like the head studs & bolts. Putting too much tension from using lubricant/anti-seize without adjusting torque wrench to some lower value would not be good. I believe ARP thread lube for their head bolts comes with an adjusted/lower torque value to use.