Daytona Twin Tec Tc88 Ignition Kit For Harley 1999-2003 Daytona Twin Tec Tc88 Ignition Kit has a wide timing advance adjustment range that accommodates stock to highly modified engines. Features: Digitally set RPM limit (100 RPM steps from 3,000 to 9,900 Rpm) Full support for J1850 data bus used for communications with instrument cluster and turn signal/security module (Tsm/Tssm) Compatible with aftermarket tachometers Built-in data logging. Stores last 30 minutes of engine operation Extensive diagnostics Optional USB interface and software for custom programming and data analysis. Billet aluminum housing with black anodized finish Easy plug-in installation