I just purchased a set of Hermoff 6123 and 6124 manifolds for my 1994 Chevy truck. These manifolds have a hole for a AIR emission device which my truck does not use. What do I use to plug these holes on my application? My local autoparts store where I purchased these items was unable to provide me with anything that would fit. Thanks for your help.
help needed -exhaust manifold
Sep 15, 2004
1 Replies
Depending on what size holes they are a dealer should be able to aquire the correct size plugs. The smaller size can use a 1/4 inch pipe plug but it must be BRASS . They larger size I believe was 18mm;same size as the ever present oxygen sensor. There have been notes in the parts catalog giving correct pn's for the plugs. The dealer might jack you on the $ for the plugs because he didnt get the BIG $$$$$ for the manifolds
sr the former gm parts guy
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required