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Old 10-31-2013, 08:09 AM   #2 (permalink)
EcoModding Apprentice
Join Date: Nov 2009
Location: Michigan
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old school WAI

When I was first introduced to cars my dad favored BIG Buicks. Typically they would have a flexible cardboard tube that could draw warn air from around the exhaust manifold and up to the air intake nozzle. There was a thermostat there that would control whether warm air was drawn in during warm up, or if slightly cooler air was used normally.

In this picture the tube has an aluminized foil coating.

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