what is the diameter and thread count of the fittings on the air injector manifold that screws into each of the exhaust pipes on the factory header of a 1988 454CID engine???? I really need some help here. Thank you very much
Fitting size for 1988 chevy 454 air injector manifold
Jun 09, 2007
5 Replies
How do you plug the holes in exhaust manifold after removing air pump and injectors on chevy
Standard pipe threaded plugs.
Thanks, but size is not standard pipe thread, I think it may be metric and it is fine thread. Do you know the actual size????
No, but it would be trivial to run a NPT tap through it.
roger454 :
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