^^^ That appears to be a good support. I'm in the same category with the hairline crack in the manifold. The thing is, I've yet to hear of it getting large enough to actually affect anything. No noise, no leaks, no worse. It's confined (in mine) to about a 3" area.
I am dead certain my manifold has glowed red several times in its lifetime. The expansion effect may play into this as much as support. This fix above will help.
I just sold my entire GTM kit within hours of listing it on MyG37 ($4k) I didn't hesitate to order a fresh manifold, though. No NEW buyer wants to have reservations, so I called, talked directly with Sam, and he cut me a deal, and shipped one out pronto. It's not free, yet my system didn't owe me a penny for what I've gotten out of it.
YMMV. I'm not a GTM hater, obviously.
