Abstract: An extruder assembly for forming a multi-layered composite is described, the extruder assembly includes an extruder head having a first and second flow passage, a first and second extruder in fluid communication with the respective first and second flow passage, and a splice bar having a first and second passageway extending from a rear side to an outlet side, and communicating flow from the first and second passageway to an outlet die. The splice bar further includes a groove located on the rear side of the splice bar and being positioned between the first and second passageway.