Fitment: Yamaha Snowmobile FX1000 WaveRunner FX140 2003-2008 Description: Condition: 100% Brand New Color: As picture Product Type: Premium Spark Plug Brand new, top quality Unique design No indexing or gaps Silver center electrode. Silver is a better conductor of heat and electricity, requiring lower voltage Extremely long semi-surface discharge at the point of richest mixture. The spark slides across the insulator, making it easier for the spark to break through the air gap of a conventional spark plug