I know we have had this question before, but indulge me because my search skills are limited. What style and thread size and pitch do I need for the holes in the manifolds for the smog "trees". Thanks
Tap size and style for Exh. Manifold AIR threads
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Re: Tap size and style for ex. Manifold AIR rhreads
Here you go Mike......
https://www.forums.ncrs.org/showthre...og+pipe+thread
https://www.forums.ncrs.org/showthre...og+pipe+thread
https://www.forums.ncrs.org/showthre...og+pipe+thread- Top
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