DYNOJET IGNITION MOD PCV YAM 6-72 6-72Allow user to advance or retard the ignition curve based on throttle position and rpm, and to tune each cylinder individually , Connect to PCIII or PC V USB via a built in expansion port link , Connect to the ignition coils through an intermediate harness connection or directly to the coil connectors; no cutting or splicing of wires is required , Direct coil driver technology allows a high degree of flexibility in timing adjustments