Made in the USA Replaces water pumps used on GM Marine, Mercruiser, Volvo Penta, Crusader, and Marine Power Applications. Replaces water pumps used between the years 1970-present in BBC (7.4L, 8.2L) applications. Brand New Circulation/Water Pump for GM/Chevy based V8 Big Block Marine Engines. This is an aftermarket new water pump that will replace the water pumps used on V8 Big Blocks - 7.4L, 8.2L marine engines. This is NOT a used, reconditioned, or remanufactured unit. This is NOT an automotive/truck part. This Package Includes: One New Big Block Water Pump Two Water Pump Gaskets 1 year warranty Will Replace the following part numbers: Mercruiser: 850454, 850454-1, 17670, 67859 Volvo Penta: 3854118, 3855991, 856609 OMC: 986074 Sierra: 18-3574, 18-3577 GLM: 15300