Here are a few pictures of the tin on my 87 911 turbo. These are on 3.4 mahle cylinders.   
I hope this helps
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Victor Toce
2000 Boxster S w/
Tequipment exhaust
1993 Spec Miata
87 911 turbo - sold
3.4 RUF pistons and cylinders
Euro CIS head
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