If you are looking to upgrade your stock coil, the Blaster Coil line is the right choice. All of the 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. The tower assembly is moulded from durable alkyd material due to its high dielectric characteristics while wide spaced brass primary terminals prevent the possibility of spark. There are several versions of the Blaster Coil available. All of them have the same internal specifications, but have different housings or components. Supplied with a 0.8 ohm ballast resistor and a terminal and boot to fit most applications. The ballast resistor must be used with stock Points Ignition and Mallory Unilite applications.