BRAND NEW ULTIMA PART # 53-50 SINGLE FIRE ELECTRONIC IGNITION MODULE Fitment: 1970-1999 Big Twin models, 1971-1995 Sportster models REQUIRES IGNITION ADVANCE UNIT – OEM advance unit will work fine, but models that came factory with points ignition will need to install an advance unit in order to run electronic ignition. Great upgrade for older points-style ignitions, or replacements for aging factory ignitions. Simple, cheap, and effective. Single fire. Has two pickups, fires each plug individually. Similar to many upgraded/aftermarket ignition systems. INSTRUCTIONS NOT INCLUDED, MUST WIRE OPPOSITE FROM DYNA S MODEL