Originally Posted by fahr_side
At this point I doubt the OP would believe my answer.
I'm pretty comfortable going up to about 800*C or 1475*F. Some will go higher, some tune for lower temps for extra reliability.
Im pretty reasonable, give me logic and some believable factual evidence and ill be on board.
The reason i replaced the stock manifold was because it was rotted to shit. It was cheaper for me to go aftermarket then to find a good condition stock one. The car i picked up for my swap sat for two years exposed to new england elements.