Modules feature two advance curve families with adjustable advance curves to accommodate stock and modified enginesUnit has five rotary switches for timing adjustments, advanced slope and rpm limitsDigitally set rpm limiter (in 100 rpm steps)Selectable multi-spark mode for quick starting and smooth cruisingCoil outputs protected against short circuitsOptional USB interface and software available for programming custom curves (programs available at http://www.daytona-twintec.com/index.html)Kit for 04-06 Twin Cam and Sportster models includes a 12-pin ignition module, software, USB-INTF interface, coil and spark plug wiresMade in the U.S.A.NOTE: Standard models not legal for sale or use on pollution-controlled vehicles.NOTE: A.R.B. E.O. #D-641-1.