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JR Race Car Spark Plug Index Washers

4.6 out of 5 stars 5 Customer Reviews

Indexing your spark plugs makes a huge improvement in how your race car drives. JR Race Car spark plug index washers are flat seat-styles precision-stamped from copper. There are three thickness sizes per package. Every little bit counts when tuning for that extra ounce of available power.

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JR Race Car Spark Plug Index Washers 654-7158

Washers, Spark Plug Indexing Shims, Flat Seat Style, Copper, 14mm Thread Size, Set of 12

Part Number: JRC-654-7158

4.6 out of 5 stars ( 5 )

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