Nitro Ignition The Nitro Ignition is the most advanced ignition system out on the market. 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 800 millijoules of spark energy for 400 micro-seconds. A combination of two ignition control units are used, the main unit houses the CD and Programming controls and another with the inductive circuitry. FOR A DUEL PLUG ENGINE, 4 COILS ARE REQUIRED!