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

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 widely identified as the "1st Design" or "Early Production" pump for 1967 Pontiacs. It features a standard 2-Port configuration (1 Inlet, 1 Outlet) with NO vapor return line. Later 1967 production models often switched to AC Type 40607 (which has a different arm spring tension).  Please visually verify your pump has only two line connections before purchasing.

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