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1974 455 Trans Am Hood Scoop

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A bit of stealth technology was used when modifying the factory Shaker scoop. It may first appear that this T/A's Shaker is riveted shut like all others from '73 forward. But it actually contains a hinged air valve like that used on '70-'72 models, which allows the carburetor to ingest cooler outside air.
1974 Pontiac Trans Am 455 - Firebird Family Affair

A bit of stealth technology was used when modifying the factory Shaker scoop. It may first appear that this T/A's Shaker is riveted shut like all others from '73 forward. But it actually contains a hinged air valve like that used on '70-'72 models, which allows the carburetor to ingest cooler outside air.  View Related Article