12V Negative Ground Electronic Ignition Kit with 12 Volt Hot Coil (Rated up to 55,000 Volts) Internally resisted: 

Prestolite Distributor Electronic Conversion Kit: USA Made Distributor Cap, USA Made Rotor, USA Made Spark plug wire set, 4 Autolite 216 Spark Plugs (14mm x 7/16" Reach)

Fits: 4 Cylinder John Deere 266, 400, 401, 410, 440, 450, 480, 600, 700, 1010, 2010, 2020, 2030, 2510, 2520 with Prestolite Distributor IBT-4101, IBT-4101L, IBT-4101R, IBT-4101S, IBT-4101U, IBT-4406

Please verify your tractor has 12V Negative Ground & the 4 Cylinder Prestolite Distributor. This Kit does not fit Delco Clip-held, Delco Screw-held, WICO Distributors, or any other Prestolite Distributors (Some models listed may have been converted / changed to a different Prestolite Distributor) 

This kit includes the Autolite 216 plugs. Verify your tractor requires the Autolite 216 plugs (14mm x 7/16" reach).  Some models listed may require a different spark plug size - Such as Autolite 405 (14mm x 3/4" reach) or Autolite 386 (18mm x 1/2" reach).  If your model requires the AL405 or AL386 size, you must let us know prior to shipping to switch plugs accordingly.