Dynatek 2000-Hde Programmable Digital Ignition System For Harley 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. Allows 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. Features: 4 built in advanced curves 4 independent rev limiter choices