Those manifolds warp like fish out of water in the hot sun all day. If you place the flange side on a bench you can see how bad it is. Although it seems to be a manufacturing defect and heat cycles that do the damage according to everything I’ve read. I’ve never reused them or replaced with new ones. Headers seem like the best way to go.
I've been doing a lot of research as well. Looks like it can go either way. I've also read that some guys think headers are sheite? Who the hell knows.....LOL, I will once I see how this works out. Thanks.
