A great upgrade option for your failed OEM coils on an early rotary engine.
MSD ignition Coil, Blaster 2, High Performance
Blaster 2 Coil
The blaster coils share the same special windings and high voltage output but do not include a ballast resistor.
When you are using an MSD Ignition control, the ignition is responsible for delivering the voltage to the coil so a ballast resistor is not necessary.