Abstract: A packing arrangement for a fluid end of a reciprocating pump is received within a packing box and is arranged to form a seal with a plunger. The packing arrangement includes a plurality of separate annular rings arranged in an abutting relationship with one another within the packing box, and a header ring disposed within the plurality of separate annular rings, the header ring including an inner surface that is non-cylindrical and that is arranged to abut the plunger, a high pressure side that is arranged in a female chevron shape, and a low pressure side opposite the high pressure side. A packing nut is engaged with the fluid end and operable to compress the header ring and the plurality of separate annular rings within the packing box.