Flame Thrower II Ignition Coils feature a very low resistance which make them the ideal coil for Ignitor II Electronic Ignition Conversion Kit as well as many other high performance ignitions. Low resistance, higher voltage enables you to run larger spark plug gaps for added power and improved fuel economy. Oil filled coils offer great heat control for street driven vehicles, while epoxy filled coils provide superior winding support for high vibration environments in off-road vehicles and boats.