No Shipping to CA Upgrade your Harley Davidson with the Daytona Twin Tec Plug-In Ignition Modules, designed for enhanced performance and reliability. Key Features: Adjustable Advance Curves: Features two advance curve families that are adjustable to accommodate both stock and modified engines. Selectable Multi-Spark Mode: Ensures quick starting and smooth cruising. Precision Adjustments: Equipped with five rotary switches for mode select, timing adjustments, advance slope, and RPM limit (in 100 RPM steps). Short Circuit Protection: Coil outputs are protected against short circuits for added reliability. Compatibility Requirements: Requires OEM coils with less than 1 ohm primary resistance and low-resistance spiral-core or carbon-core suppression-type plug wires. Optional Power Adapters: 12 V power adapters can be used to power up the modules when removed from the bike (sold separately). Easy Installation: Comes with easy-to-follow instructions for a hassle-free setup. Note: Will not work on fuel-injected models. Made in the U.S.A.: Ensures superior quality and craftsmanship. Race Only Version will require USB Interface - Click Here Enhance your bike's ignition system with Daytona Twin Tec Plug-In Ignition Modules. Order now and experience improved performance and reliability!