Filter with efficiently sealed end

A filter element comprising pleated filter media having a plurality of pleats in a closed loop having an outer perimeter defined by a plurality of outer pleat tips, and an inner perimeter defined by a plurality of inner pleat tips, said loop having a hollow interior extending along a given axis, wherein fluid flows axially in said hollow interior, said filter element having first and second axial ends, said first axial end being open and providing an axial flow passage therethrough along said axis communicating with said hollow interior, a resiliently compressible end cap at said first axial end covering said inner and outer pleat tips and spanning radially between said inner and outer perimeters, a flow tube communicating with said hollow interior and extending along said axial flow passage and engaging said end cap, wherein said flow tube at said engagement with said end cap has an inner perimeter greater than said inner perimeter defined by said inner pleat tips, and comprising in combination a second end cap at said second axial end of said filter element covering said inner and outer pleat tips and spanning radially between said inner and outer perimeters and also spanning said hollow interior and closing said second axial end of said filter element.