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What is this plug on the back of the intake manifold?

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Old 02-28-2007, 05:47 PM
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That red piece in my picture had a plug that came out, and a hose nipple went in it's place....brake booster hose went on there.
Old 02-28-2007, 05:54 PM
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damn, so it looks like I'm trying to cram the wrong plug in the right hole!!

Do you have a picture or part number of the hose nipple that plugged into the intake?
Old 02-28-2007, 06:18 PM
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I don't....I have a buddy who works at a dealer that does a lot of s/c installs, and he swiped one off an extra intake manifold for me. Might try CHEVRACER83's part number thread.

https://www.performancetrucks.net/fo...d.php?t=376463
Old 02-28-2007, 09:08 PM
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I pulled that plug out tonight, drilled it out with a 9/32" drill bit, and then tapped it 1/8" NPT. I'm going to get a 1/8" NPT to 3/8" barb fitting at the hardware store to attach it...
Old 03-01-2007, 12:05 AM
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Default Manifold fitting

Go to Chevy dealer. Order or buy the intake manifold to brake booster hose and fitting, it's like $3. Has a nice tight 90 in the hose to clear firewall. The fiting itself was like 80 cents.
Old 03-07-2007, 11:27 PM
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Thanks for all the help. I went to the dealer and bought the correct nipple.

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