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Forum: 77-81 Firebird & Trans Am TECH 04-24-2021, 07:19 PM
Replies: 5
Views: 1,419
Posted By johnta1
My info above was from John Witzke's data. ...

My info above was from John Witzke's data.


This is from a Parts Catalog:


http://forums.maxperformanceinc.com/forums/attachment.php?attachmentid=565343&stc=1&d=1619306334

...
Forum: 77-81 Firebird & Trans Am TECH 04-24-2021, 06:52 PM
Replies: 5
Views: 1,419
Posted By johnta1
This is a Back pressure transducer? (not the EGR...

This is a Back pressure transducer? (not the EGR valve?)

For 1977 W72:

Part # 549426 - Manual

Part # 10000029 - Auto


For 1978 W72:
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