New Surplus Unison Lasar Electronic Ignition System 24v p/n 66SLC-1022-03 w/ 8130-3. We found these in an inventory we purchased. The only thing included in the box is the Lasar system control box (see pictures) and the 8130-3. This unit is for engine model Lycoming O-360. LASAR, which stands for Limited Authority Spark Advance Regulator, is the first microprocessor based engine control system approved by the FAA for general aviation piston aircraft. STC approval has been granted for most 320, 360 and 540 engines. Installation requires replacement of standard magnetos with Lasar magnetos, a LASAR Control Box, which is mounted to the firewall, a low-voltage control harness that carries the electronic signals between the system components.