Product details:

On Product Combines Cancer Reproductive Size : 1/2 GALLON Sierra Marine 18-3577-2 Pump, Big Block GM Circulating. Fits GM V8 Big Block 409, 454, 482 & 502 cid engines. It is designed to fit both stamped and composite timing covers. Features: Fits both LH & RH rotation engines Bi-rotational bronze impeller Stainless steel backing plate Includes Mounting Gaskets