Which Ignitech Ignijet version do I need, and what functions does it have (e.g. Honda CBR1100XX)?

The Ignijet 05 drives up to 4 injectors, has one map and no launch control. The Ignijet 12 is the better choice for bigger engines; it is supplied with a plug-and-play connector adapter and works with the original dashboard. It comes in versions: A (basic, no race functions), C (adds quickshifter and gear shift light) and D (no limitations: launch control/start limiter, pit speed limiter, N2O control, etc.). Some functions, such as boost control, are only available in version D.