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Old 03-12-2018, 08:20 PM
John V. John V. is offline
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Join Date: Sep 2005
Posts: 4,765
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For '64 GTO

Head pipes were 2.25"

Mufflers were 2.25" inlet and 2.00" outlet

Tailpipes were 2.00"

Same exhaust for auto and manual trans

'65 was different.

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