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SBC-BBC-LT1-LT4 PERFORMANCE
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!AIR manifold plugs?

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

!AIR manifold plugs?

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Jun 22, 2006 | 11:50 AM

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!AIR manifold plugs?

I need to know what size the stock threaded holes are in the stock exhaust manifolds on a 93 Z28 where the AIR tubes went. I did the AIR removal and went to a few hardware places to try and find bolts or plugs to close those holes off but they didn't have anything that big. It appears to be 3/4" X unknown thread. Nobody I went to could figure it out or had anything. Compression and pipe thread also didn't work. If someone can give me the size / pitch and a store I can go to get it that would be awesome. Thanks.

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Jun 22, 2006 | 07:21 PM

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Get M22 metric drain plugs, I got mine at NAPA

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Jun 23, 2006 | 03:21 PM

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Thanks! Do you remember what pitch? Thanks!

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Jun 23, 2006 | 03:35 PM

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Like Low N Slow said, M22 metric plugs. I don't think there is a specific pitch like an SAE, its just M22.

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Jun 23, 2006 | 10:15 PM

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I had to plug off mine in the old Headers I had, I used some 5/8 tapered plugs from Lowes.

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93, air, bolts, exhaust, lt1, mainifold, manifold, plugs, z28

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