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what is inlet size of the stock cat on an A4 1.8T??

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Old 01-19-2002, 07:35 PM
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what is inlet size of the stock cat on an A4 1.8T??
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Old 01-19-2002, 08:12 PM
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2.5" in, 2.25" out.
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Old 01-19-2002, 08:16 PM
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thank you again
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