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05-12-2011, 01:51 PM	#1
custom1970 Member Join Date: Jan 2011 Location: Stuart, Florida Posts: 467	What's this? I know this is on a Pontiac (please don't rip me) but my 70 chev. p/up also had one. A guy on the Pontiac Forum wants to know and no one has figured it out. I thought it went to the air cleaner, regulating the fresh air flow from outside to hot air by exhaust, but i was never 100% sure . Thanks! Attached Images

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