One-Way Check Valve
One-way check-valves are a perfect solution to restrict oil flow to one direction. The high-flow flapper-valve will have minimal impact on flow while maintaining an excellent seal. Highly recommended for use with out oil filter relocation products when the oil filter mount has been mounted higher than the outlet on the block adapter.
Installation of this check valve should be done as close to the oil lines source, to prevent the line, filter mount, and oil filter from draining back to the blocks oil galley and ultimately back to the pan.