991.1 Bore Score?

[Schuey_911]

Folks,

Not sure why, but this video appeared in my feed this morning and thought I'd post it here for awareness and a heads-up more than anything, in case it helps any of you.

https://www.youtube.com/watch?v=SUc9Jc1URLo

Seems like a pretty genuine honest video with a customer who was directly impacted. Worth a watch at least.

[ChrisW.]

But it's not just bore score with this owners engine ...

Modified exhaust, fused electrode on spark plug 6 and a hole in one of the valves adds up to more than bore score.

Are they linked ? If so, how ??