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. Features: Extra tall secondary tower for secure coil wire connection Improved output coil for electronic ignitions, and MSD Ignitions (ballast resistor required for points)?Çó?á?á100:1 turns ratio and lower primary resistance produce high voltage output MSD Red metal canister is filled with a premium grade oil for cooling Supplied with a 90?? spark plug style terminal and boot CARB E.O. Approved