This kit will fit any flat seat 14mm spark plug. These washers are made out of copper and the kit includes the following sizes: (8) .006", (8) .012", (8) .024", (8) .036", (8) .046" washers.
No other indexing washers on the market can give you as much adjustability as this kit. This kit allows you to index your plugs wherever you want them within one thread revolution of the the plug, thus keeping the plug as deep into the combustion chamber as possible.
