Compu-Fire electronic advance modules are used to convert stock Dual Fire ignitions to Single Fire electronic ignitions in single-cam Big Twins from 1970 to 1999, as well as Sportsters from 1971 to 2003. They can also replace Prestolite type modules. and advanced HD electronic modules. They have a built-in non-adjustable advance curve that works great on stock and lightly tuned engines with stock compression ratio. The ignition comes complete with a trigger rotor which replaces the original mechanical advance unit. For use with a 2.5 to 3 Ohm Single Fire coil.
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