The MSD Programmable Nitro Ignition system combines the benefits of a Capacitive Discharge Ignition with the best features of an Inductive ignition. The result is an incredible spark with high voltage and long spark duration. There are two ignition controls, the main control with the CD and programming controls and another with the inductive circuitry. The two controls are triggered and send their unique power characteristics to two hybrid coils. These coils must be used with the Nitro Ignition and combine the two sparks to work as one. The CD side is primarily responsible for ionizing the spark plug gap while the current from both coils produce a high level of current and sustained spark.