Programmable Single Fire Electronic Ignition Module Fit for S&S Harley Evolution Ultima Revtech 36697988Features: Single Fire operation down to zero rpm for easier cranking and kicking. Will operate in all combinations of single fire or dual fire with single plug or dual plug heads. (when used with appropriate coils) 8 advance curves to cover a broad range of engine builds and riding styles. Engine over rev protection adjustable from 6000 to 7500 rpm. Adjustable timing retard for nitrous and turbo applications. VOES indicator. Allows you to tell at a