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Size of air tube holes in manifold?

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Old 04-09-2004, 12:24 AM
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Car: 1989 Camaro Iroc-Z
Engine: stock 350
Transmission: 700R4
Size of air tube holes in manifold?

Was just wondering what size the holes are in the manifold that the AIR tubes screw in to because I plan on removing them soon and need to find some plugs to put in there. What size are they?
Old 04-09-2004, 12:38 PM
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Car: 1991 Chevy Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.42
From what I have been told they are 1/4" flare plugs. I am in the process of removing my AIR sytem, too. Although, the original screws that went in the holes look like 3/8" to me. The plugs are sold at home improvement stores, from what I have been told.
Old 04-10-2004, 09:43 PM
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5/16 inflared tubing plugs is what worked for me ......pipe plugs won't thread very far, but will probably still seal
Old 04-11-2004, 04:35 PM
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Car: 1991 Chevy Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.42
Where did you get those plugs at? I tried the 1/4 and 3/8 flare plugs but they are either too big or too small.
Old 04-11-2004, 08:04 PM
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Originally posted by Benm109
Where did you get those plugs at? I tried the 1/4 and 3/8 flare plugs but they are either too big or too small.
I got mine at a industrial rubber and gasket co. I don't think mine are the right length however. Seems they didn't really bottom out for a good seal. I believe Gm uses a metric size on that tubing......
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