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 enginesBi-rotational bronze impellerStainless steel backing plateIncludes Mounting Gaskets | The engine is the powerhouse of your boat, and it needs to be maintained properly to ensure that it runs smoothly and efficiently. One of the best ways to do this is by using an engine circulation pump, like Sierra's model 18-3577. This pump is designed to circulate coolant through your engine, helping to keep it cool and prevent overheating. It also helps to remove any impurities or debris that may have accumulated in your engine's coolant system, ensuring that it runs smoothly and efficiently. Made from high-quality materials, you can trust Sierra's products to deliver outstanding performance every time you use them. So why wait? Don't compromise on quality - choose Sierra today!
![Sierra Circ Pump 454 [18-3577]](https://cdn.shopify.com/s/files/1/0148/6399/0848/products/SIE183577.gif?v=1612538538&width=480)
![Sierra Circulating Water Pump [18-3577-2]](https://cdn.shopify.com/s/files/1/0148/6399/0848/products/SIE1835772.png?v=1612541014&width=480)
