We recommend a complete package for best results. 12 volt package consists of the electronic ignition unit, high voltage coil resistor and 8mm spark plug wires. 6 volt package includes the 6 volt electronic ignition unit, 6 volt coil, and 8mm spark plug wires. PACKAGE NUMBER REFERS TO NUMBER OF ELECTRONIC IGNITION UNIT THAT FITS YOUR TRACTOR'S DISTRIBUTOR.
