Fits Big Twin 1970/1999 (except EFI & Twin Cam) & Sportster 1971/Later (except 1200S) with aftermarket single fire ignitions that require a 3 OHM coil. Use A1697 coil cover mount. Mounts in OE location. Perfect for use with the Dynatek 2000 or Dynatek 2000I ignition module. Includes instructions.