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Which thread on Holley air cleaner stud?

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Old Jun 15, 2014 | 01:29 PM
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Default Which thread on Holley air cleaner stud?
Any idea?

Regards, Günther
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Old Jun 15, 2014 | 01:49 PM
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either 1/4-20 or 5/16-18 you should be able to meaure the hole diameter
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Old Jun 15, 2014 | 02:29 PM
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Thank you!
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Old Jun 15, 2014 | 05:34 PM
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I just walked inside after installing a longer air cleaner stud (went from a 3" filter to a 3 1/2" filter) it's definitely 1/4-20. You can get threaded rod at just about any hardware store. I like to use some blue Loctite and a jam nut to hold the stud in place.

Scott
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Old Jun 16, 2014 | 04:41 PM
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You were right. It was 1/4-20 UNC.

Thanks, Günther
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Old Jun 16, 2014 | 09:38 PM
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Standard Holley 4150's are 1/4-20. Holley HP main bodies have 5/16-18 carb studs.
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