I'm trying to identify these pistons for a friend.
My shelf of knowledge came up empty for these....try to ignore the carnage. They are Mahle 90 mm, but the valve cut outs threw me....the cutouts *appear* to be part of the orginal manufacture. What appears to be a dish in the top of the piston...is. MM is involved here so we gots a box of chocolates.
On to the pics:
