Indexed spark plugs align the open end of the electrode toward the intake port
The hottest flame meets the new fuel charge for a performance gain, increased mileage and plug life


*Gold washers- .75 mm
*Silver washers- 1.00 mm
*Purple washers - 1.25mm
*Red washers- 1.60mm
*8 Pieces 

Colored Spark Plug Indexing Washers -

SKU: SM-01047
$4.50Price