Remote oil filter heads are used to relocate an oil filter, often when space is at a premium in kit cars and race cars. Or to move to a 'safe' place on 4x4 vehicles. The remote filter heads are used in conjunction with a Sandwich Plate and Cover Plate in order to get oil away from the engine and to the remote filter head.
It is worth remembering when plumbing in your remote oil filter head, that oil flows into the outside of an oil filter, then exits up the middle.