Fluid end with threaded dynamic section

A high-pressure pump having a body, the body comprising first and second sections, wherein:

• the first section has an internal bore and a set of external threads, the external threads circumscribing the internal bore;
• the second section has an internal bore and a set of internal threads, the internal threads circumscribing the internal bore;
• wherein the external threads of the first section are configured to mate with the internal threads of the second section such that the internal bore of the first section and internal bore of the second section are aligned to form a longitudinal through-bore, the high-pressure pump comprising:
• a fluid routing plug disposed within the longitudinal through-bore, the fluid routing plug extending from a first side to a second side;
• and
• a two-piece wear ring disposed between the fluid routing plug and the first section.