This Blaster Coil is supplied with a ballast resistor. If your application uses a points distributor, the ballast must be used. Late-model electronic ignitions or an MSD Ignition do not require the ballast.
If you are looking to upgrade your stock coil, or want to compliment the performance of your MSD Blaster Ignition, MSD 5, 6, or 7, the Blaster Coil line is the right choice. Our Blaster Coils are designed for improved spark output! Special 100:1 windings are used to provide maximum build-up of voltage! These windings are held secure and kept cool in an oil-filled metal canister.