SPARK PLUG INDEX WASHERS TAPERED SEAT

Spark Plug Index Washers, Copper, Tapered Seat, for 14mm Plugs, Sizes .010, .021, .032 in., Set of 30. These Moroso Spark Plug Indexing Washers are designed for use on all Tapered seat 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.