A filter adapter for a fuel injector is disclosed. The filter adapter may have a filter housing. The filter housing may have a first connection end and a second connection end. The filter housing may also have a through bore extending through the filter housing between the first connection end and the second connection end and forming a filter cavity. The filter adapter may also have a first filter positioned in the filter cavity and including a first plurality of openings and a second filter positioned in the filter cavity and including a second plurality of openings. The first connection end may have a first connector configured to mate with a fuel outlet of a first fuel system component. The second connection end may have a second connector configured to mate with a fuel inlet of a second fuel system component.