Patent ID: 8753415

Claim:
A filter element comprising: (a) a tubular extension of filter media defining an open filter interior; (i) the tubular extension of media comprises a cylindrical extension of pleated media; (b) a first end cap secured to the tubular extension of filter media; the first end cap having an opening in communication with the open filter interior; the first end cap including a sealing portion; (i) the sealing portion extending radially into the opening and constructed and arranged to form a radial seal with a housing body, when the filter element is operably installed in a housing body; (c) a second end cap secured to the tubular extension of filter media opposite of the first end cap; the second end cap being a closed end cap with no openings therethrough; (i) the second end cap including an outer wall circumscribing the tubular extension of filter media; the outer wall being non-circular and including a plurality of first protrusions radially projecting from the outer wall and a plurality of second protrusions radially projecting from the outer wall; the first protrusions projecting further from the outer wall than the second protrusions.