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Tag Archives: Vacuum Operated Exhaust

The 1970 GTO’s Craziest Option: W-73 Exhaust Cutouts

Posted on May 3, 2026 by MCG

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This is the implausible but almost completely true story of Regular Production Option W-73 for the 1970 Pontiac GTO: driver-operated exhaust cutouts. Continue reading →

Posted in Auto History | Tagged 1970 Pontiac GTO, Pontiac, Pontiac W-73, Vacuum Operated Exhaust | 3 Replies

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