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Deputy Director Region 6
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8,775 Posts
Discussion Starter #1
Does anybody know the difference in these Oxygen Sensors ?
AC Delco AFS-20/GM 25162693 & AC Delco AFS-22/GM 25106073 ??
Need a new one in my 87 4.3L
Thanks !!:beer:
 

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Super Moderator
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4,363 Posts
Both are upstream with one superceding the other.
 
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