021 101 371 S would this be the part number for 1.8 Porsche cylinder head. I know its not 2.0 found that part number earlier. It's 039 101 371 A
Hmm 2nd and 3rd grouping identical. Getting somewhere now.
Second group is the general area of the part. Third group is the specific part. Letter suffix or two-digit suffix (if any) is a revision or version indicator.
That is the number for a 1.8 head, yes.
https://web.archive.org/web/20130404151556/http://tunacan.net/t4/reference/cylhead.htm
--DD
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