This heavy-duty Z-Series 8-pin lower-section hook-up cord is to be used with all J&M® Elite Series headset #’s HS-ECD584, HS-ICD584, HS-ECD477, HS-ICD477, HS-ECD374, HS-ECD271 and HS-ECD269 headsets, for connection to 1998-2009 Harley® 7-pin audio systems.