[protpibe]

Yeah, it's not exactly minor lol.

My guess on the header warpage issue after experiencing it is that the header needs to be installed correctly the first time. Proper gaskets, proper torque pattern, and re-torquing as it's heat cycled. It seems like it's warping if it weight distribution isn't near perfect the first time it's installed, and once it's warped it's warped. Just my own personal opinion, I'm not sure how much validity there is to it.