The Humbler: 1970 Pontiac GTO’s vacuum-operated exhaust was ahead of its time – Fox News

The Humbler: 1970 Pontiac GTO’s vacuum-operated exhaust was ahead of its time – Fox News


Fox News

The Humbler: 1970 Pontiac GTO's vacuum-operated exhaust was ahead of its time
Fox News
Pontiac performance was available across the lineup, but the driver-controlled, vacuum-actuated, dual-mode exhaust was exclusive to the GTO. For 1970, Pontiac referred to the GTO as the Humbler, suggesting that the collective power of Pontiac …

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