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Bare 1973 Pontiac SD455 engine block on a workbench showing the four-bolt main bearing caps and forged connecting rods
Car Features

The SD455's Special Block

Dan Reeves · · 6 min
Ram Air IV 400 V8 engine bay detail in a Pontiac Firebird showing round-port heads and hood scoop
Car Features

Pontiac Power: The 400, 455 and Ram Air Engines

Dan Reeves · · 8 min
Black and gold 1977 Pontiac Trans Am Special Edition on a rural highway at dusk
Car Features

The Pontiac Trans Am: America's Muscle-Era Survivor

Patrick Walsh · · 9 min
Close-up of the 1973 Pontiac Trans Am SD455 big-block V8 engine bay with shaker hood scoop
Car Features

The SD455: The Last Real Muscle Car

Patrick Walsh · · 6 min
1971 Pontiac Firebird Trans Am second-generation, blue with hood bird decal, parked on a road at golden hour
Car Features

Second-Generation Firebird 1970-1981: The Definitive Bird

Mike Sullivan · · 9 min