Spark Plug Indexing Washers - Gasketed Seat

These Spark Plug Indexing Washers are designed for use on all 14mm spark plugs. They include 30 washers with three thicknesses to choose from. Washers will correct the electrode placement on any plug and simplify the time-consuming task of spark plug indexing. These Moroso Spark Plug Indexing Washers are designed for use on all 14mm spark plugs. They include 30 washers with three thicknesses to choose from. Washers will correct the electrode placement on any plug and simplify the time-consuming task of spark plug indexing.