Fuel Pump 40521 Pontiac 1967 GTO Firebird LeMans 326 400 V8 Early Production

Part Number: 40521 (AC Type 40521)

Type: Mechanical Fuel Pump (2-Port / Early 1967 Design)

Replaces OEM Reference: GM 6440521, GM 6416911

Note: This pump is specific to "Early 1967" production models. It features a standard 2-port design (1 Inlet, 1 Outlet) with NO vapor return line. It uses a different actuator arm spring configuration than the "Late 1967" pumps (which typically use AC 40607). Please verify your original pump does not have a third return line before purchasing.

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