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What is this for?

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Old 05-31-2020, 02:07 PM
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Default What is this for?
Howdy, back again with another basic question. I know the large nipple is for my brake booster, but what is the small nipple for?

What is this small nipple for?
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Old 05-31-2020, 04:52 PM
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Its a vacuum line for the air conditioner on the 4th Gen Fbody V8 cars and I've also seen it used to connect up a map sensor.
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Old 05-31-2020, 04:54 PM
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The port on the top is where the MAP sensor goes on a stock LS1-LS6 intake and it looks like its been plugged or capped off.
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