Small oil filter adapter as used on 1975 through 1993 big twins. This is the threaded fitting that the oil filters 14153000 and HF552 screw on to. These adapters are used in the bottom of the oil pan or oil sump. This is the item that you remove from the original oil pan in order to fit one of the external oil filter devices. See related items.
Note: this item is a special order item, please read store policies regarding special order items and allow a typical 2 to 3 additional weeks for delivery.