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Why do they call it a conical header?

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Why do they call it a conical header?

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Old 10-27-2006 | 04:07 PM
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Default Why do they call it a conical header?

The pipe has some what of a cone shape but I don't see it in the header???
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Old 10-27-2006 | 05:16 PM
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A conical header is smaller at the exhaust port, and bigger going into the pipe. I'ts visible to the eye on the Novarossi headers, not sure about others though.
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Old 10-27-2006 | 07:09 PM
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OK thanks I will look at some.
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