Upgrade your Harley Davidson Sportster with the Daytona Twin Tec External Plug-In Ignition Modules, designed for enhanced performance and easy customization. Key Features: Adjustable Advance Curves: Features two advance curve families that can be adjusted to accommodate both stock and modified engines. Selectable Multi-Spark Mode: Ensures quick starting and smooth cruising. Precision Timing Adjustments: Equipped with four rotary switches for timing adjustments, single/dual ignition mode, and RPM limit (in 100 RPM steps). Short Circuit Protection: Coil outputs are protected against short circuits for added reliability. Compatibility Requirements: Requires coils with a minimum of 3 ohms resistance and low-resistance spiral-core-type plug wires. PC-Link Compatibility: Uses the tachometer wire for the PC-link and comes with a connector for easy setup. Optional USB Interface and Software: Available for programming custom curves. Click Here Programs can be downloaded from the Daytona Twin Tec website. 12V Power Adapter: Used to power up the ignition system when removed from the bike and for installing new maps (sold separately). Made in the U.S.A.: Ensures superior quality and craftsmanship. Enhance your Sportster's ignition system with Daytona Twin Tec External Plug-In Ignition Modules. Order now and experience improved performance and reliability!