A plug-in upgrade to the electronic advance ignition found on late model Harleys, these ignitions are micro-computer controlled, generating extremely accurate control over the entire ignition process. Allow riders to tailor the advance curve and rev limiter to the specific needs of their particular engine; four built-in advance curves cover the needs of stock to highly modified engines over a variety of operating conditions; four independent rev limiter choices from 6000 to 7500 rpm set the exact protection level needed.