Daytona Twin Tec DTT-1005S-EX Nose Cone Ignition Module for Sportster 98-03ARB EO Legal for the following applications (D 641 3) 1998 2003 Sportster 883 1200 except 1200S. Includes mating Deutsch plug and harness for single fire conversion. Wide timing advance adjustment range accommodates stock to highly modified engines. Digitally set RPM limit (100 RPM steps) Selectable single or dual fire mode Selectable multi spark mode for quick starting and smooth cruise Coil outputs protected against short circuits Optional USB