If you are running single fire and a tach, it is recommended that you also use our tach adapter, part number HQ-21850. These Compu-Fire coils are high output coils which produce more energy from a smaller design. Closed-core and 3 ohms of resistance with a 42,000 volt output. They work well with our HQ-21835 ignition. Designed to resist shock and vibrations.
Brackets hold a pair of coils.
Both Big Twin models come complete with chrome cover, installation hardware, and mount to the engine.