US Made 12v Negative Ground Electronic Ignition Kit with "Hot" Coil (Rated up to 55,000 Volts) Internally resisted, Complete Ignition Tune up kit: US Made Distributor Cap, Rotor button, USA Made Straight boot spark plug wire set & 4 Autolite 386 Spark Plugs 18mm x 1/2. Fits: 4 Cylinder Massey Ferguson 20, 30, 35, 40, 50, 65 135, 150, 165, 175, 180, 181, 202, 204, 235, 255 265, 285, 302, 304, 356, 2200, 2500, 3165. Please verify your tractor has the Delco Screw Held Distributor. This Tune up kit does not fit Delco Clip Held, Prestolite Distributors, Lucas Distributors or Magneto....