Twin Tec Ignition Kit for All 2003-2006 Carbureted ModelsTwinTec TC88A complete Ignition kit This ignition kit is specially developed for all Twin Cam and Sportster 2003 2006. These motorcycles are using the SAE J1850 data bus for communication between the ignition module, instrument cluster, turn signal security module and diagnostic scan tools. This ignition module fully supports this new data bus including the use of a HD scan tool to read sensor data and clear diagnostic codes. The ignition module TC88A