Finally, we've reproduced these impossible to find 5 bolt heavy duty water pumps! These were used on Dodge motorhome's such as Travco's and others with the heavy duty 413. Originally sold as Chrysler # 3420225, these are the ones which feature the small 5/8" pilot shaft for the pulley. Be sure to check the snout or "hub" on your old unit and make sure it looks identical to the picture, some applications may use the other version with the large hub (we carry these also, listed separately.) Completely new part, not remanufactured. Sold outright, with no core or exchange of your old water pump necessary.