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I/O Circulating pumps all water pumps are 100% OEM interchangeable and are guaranteed to meet or exceed OE specifications. Manufactured in the USA. |
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| Type | Fits | OE# | Type | Part# |  |
| Water circulating Pump | 2.5L & 3.0L GM I/L 4 & 6 Cylinder | Merc-814755 OMC/Volvo-3854017 | Pro | 64727 | |
| MES | WP447M | ||||
| Small block water Pump | 305/350 5.0L/5.7L GM V8 & 4.3L V6 | Merc- 17437, 850399 1 OMC/Volvo- 3853850 | Pro | 64399 | |
| MES | WP453ML | ||||
| Big block water Pump | 454/502 7.4L/8.2 liter GM V8 | Merc- 17670, 850454 1 OMC/Volvo- 3855991 | Pro | 64454 | |
| MES | WP415M | ||||
| Big block water Pump | 496/8.1L GM Vortech V8 | Merc- 883925 oem gaskets included | Pro | 64925 | |
| Water Circulating Pump | 289/302/351 CID ford V8 | Merc- 71683A 1 OMC/Volvo- 883885/3853796 | Pro | 64885 | |
| MES | WP520M | ||||
| Water Circulating Pump | 460/429 7.5L | OMC/Colco- 984889 | Pro | 64889 | |