Seller notes

Denso Iridium Spark Plug #5317 Vespa ET2 50 1997-2001 Product Details Six times harder than platinum, iridium doesn't melt in temperatures up to 4,000 degrees FahrenheitBecause the iridium electrodes of these plugs can be shrunk to only 0.4mm, voltage requirements decrease while firing performance improves360 degree laser welding of electrode provides a seal that resists wear even in the worst conditionsGround electrode features a tapered cut and u-groove that form a large volume area for the fl...

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