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7 When installing a PerTronix Ignitor electronic ignition system, it is best to pair it with a matched coil. There's a very real possibility the coil you are currently using has the wrong resistance value for the Ignitor system, so why not play it safe and install the right coil too. This is a Flame-Thrower 40,000 volt coil, which allows larger plug gaps for increased performance and better throttle response. PerTronix offers their Flame-Thrower coils in chrome and black bodies with 1.5 or 3.0 ohm primary resistance (we're installing a 1.5-ohm model) and are CARB EO legal in all 50 states.