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Home >> Porsche >> 1971 >> 914 6, Not Available Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Exhaust Emission Systems >> Description >> Air Intake Pre-Heating
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Air Intake Pre-Heating

A vacuum box is incorporated in the air intake scoop with a diaphragm and lever operating the regulating flap. Vacuum box is connected by hoses to the intake manifold by a ventilating valve which is regulated thermostatically.