Quote:

From past research my notes indicate the exposed fire ring in the PT was a tin material, and it was stainless steel in the 059 marine.

And because of that I always believed the stainless steel, being harder than tin, would probably do more damage to an aluminum head, and that's why I never used it.

Please correct me if I am wrong on that?

Thanks!


I think it's the wire o-ring, rather than the stainless steel "wrapper", that's leaving the indentations... I believe the DG gaskets I used to run also had stainless fire rings w/o any wire insert and they never left a mark on my Stage VIs after multiple uses.