For DPA Pump Replacement Head Rotor 7123-340J 4/6.5R HD Auto Engine Parts 7123-340J Replacement head rotor designed for DPA pump models with part number 7123-340J.Compatible with 4/6.5R HD Auto engine systems.This component serves as a direct replacement for the rotor, consistent performance in fuel injection pumps.Constructed to meet standard specifications for durability and function within heavy-duty applications.Suitable for use in appropriate DPA pump assemblies requiring maintenance or part renewal. This is a replacement item from an aftermarket supplier.Brand names are cited solely to demonstrate device compatibility.