After reading two different threads 1 new and 1 old, I now realize that I am missing this part on my 74 1.8. I don't know the difference between that parts but one has a A supersession. Part number: 021 101 109 A (for 1.8 per Porsche PET Part 36) vs 021 101 109. It's probably a long shot but would be nice to have. Please PM me. Thank you in advance.