Kit includes ignition module, 8.5mm spark plug wires, single-fire coil and instructions Ignition system has two advance curve families with adjustable advance curves to accommodate stock to wild engine modifications Four rotary switches for adjusting timing and single-dual fire rpm limit digitally set rpm limit (in 100 rpm steps) Selectable single or dual-fire mode Selectable multi-spark mode for quick starting and smooth cruising Coil outputs protected against short curcuits Optional USB interface kit and software (programs available on website www.daytona-twintec.com/index.html) available for programming custom curves (PC-link cable must be purchased separately) Requires the use of Ignition Rotor 383-497 Uses the tachometer wire for the USB interface and comes with a connector