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Author Topic: Air Injection Exhaust Manifold Plug Size  (Read 6977 times)

Offline LarryC

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  • Posts: 8
Air Injection Exhaust Manifold Plug Size
« on: January 09, 2006, 09:51:00 pm »
Does anyone know the size and thread pitch to plug the exhaust manifold holes for the air injection hardware on a 74 350?

Thanks,
Larry

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Offline DnStClr

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  • Posts: 1806
Re: Air Injection Exhaust Manifold Plug Size
« Reply #1 on: January 11, 2006, 12:35:00 am »
Larry, try a 1/4" npst. (nat'l pipe straight thread)  Naturally, you always want to use antiseize.

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Don
87 Chevy Silverado
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