Jaymanbikes Posted February 24, 2020 Share #1 Posted February 24, 2020 Interested in knowing what you guys used to plug the air rail holes In your stock exhaust manifold? I used some galvanized plugs in my manifold that is now leaking. Will be replacing that manifold and looking for other suggestions. Link to comment Share on other sites More sharing options...
240260280 Posted February 24, 2020 Share #2 Posted February 24, 2020 some changes make whistling sounds. Link to comment Share on other sites More sharing options...
DatsunZGuy Posted February 24, 2020 Share #3 Posted February 24, 2020 I had a Z where the PO just sawed off the main rail of the air gallery and crimped the ends. Another car I owned had it removed, plugs left in place and the holes plug welded. The latter looked much better. Link to comment Share on other sites More sharing options...
7tooZ Posted February 24, 2020 Share #4 Posted February 24, 2020 I used brass plugs and screwed them in. Link to comment Share on other sites More sharing options...
David F Posted February 24, 2020 Share #5 Posted February 24, 2020 3 hours ago, DatsunZGuy said: I had a Z where the PO just sawed off the main rail of the air gallery and crimped the ends. Another car I owned had it removed, plugs left in place and the holes plug welded. The latter looked much better. I did a hybrid of above. I cut the tubes, pinched them closed and welded the pinch together. Link to comment Share on other sites More sharing options...
Patcon Posted February 24, 2020 Share #6 Posted February 24, 2020 Galvanized plugs are pretty hard and won't seal as well as something softer like brass Link to comment Share on other sites More sharing options...
Clay C Posted February 25, 2020 Share #7 Posted February 25, 2020 https://zcardepot.com/collections/exhaust/products/exhaust-manifold-air-smog-pipe-plug-240z-260z They sell plugs here. 1 Link to comment Share on other sites More sharing options...
w3wilkes Posted February 28, 2020 Share #8 Posted February 28, 2020 MSA ceramic coated headers did the job for me, followed up with 2.5" exhaust. badabing. https://www.thezstore.com/page/TZS/PROD/classic19d/15-6012CH 1 Link to comment Share on other sites More sharing options...
siteunseen Posted February 28, 2020 Share #9 Posted February 28, 2020 (edited) Me too! Love the sound. Bada boom. Edited February 28, 2020 by siteunseen Link to comment Share on other sites More sharing options...
Jaymanbikes Posted February 29, 2020 Author Share #10 Posted February 29, 2020 7 hours ago, w3wilkes said: MSA ceramic coated headers did the job for me, followed up with 2.5" exhaust. badabing. https://www.thezstore.com/page/TZS/PROD/classic19d/15-6012CH Yea, keeping this car as close to original as possible. Have a header on my other Z Link to comment Share on other sites More sharing options...
grannyknot Posted February 29, 2020 Share #11 Posted February 29, 2020 Similar to others, cut off the plugs, welded shut and and ground down all of the metal inside of the runner that was obstructing the exhaust flow. Link to comment Share on other sites More sharing options...
Jaymanbikes Posted February 29, 2020 Author Share #12 Posted February 29, 2020 Thanks all, I didn’t want to damage my air galley rail, as you can see from the pic it’s a perfect piece and has been replated. I chose to get the plugs from Z Car Depot. 1 Link to comment Share on other sites More sharing options...
Jeff Berk
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