the one that meets OEM specs and gets changed at regular service intervals.
Fits '17-later Milwaukee-Eight®, '99-later Twin Cam and Evolution models (except '08-'13 XR) and can be used as an upgrade for any motorcycle that requires Oil Filter P/N 63796-77A, 63805-80A, 63812-90 or 63813-90.
Leave the gun. Take the cannoli.
The problem with the world is that everyone is a few drinks behind.~ Humphrey Bogart