I want to update this for future reference if this thread comes up in a search to assist the next person.
From Mahle:
"this piston is made from our M142P alloy, which is stronger than the more common 4032 alloy while retaining minimal thermal expansion allowing tighter piston-wall clearances than 2618."
It has 13.2cc dish volume, 1.220” comp. height, and 1.5, 1.5, 2.5mm ring pack.
