Denso Iridium Spark Plug - IUF22 5383
Six times harder than platinum, iridium doesnt melt in temperatures up to 4,000FBecause the iridium electrodes of these plugs can be shrunk to only 0.4mm, voltage requirements decrease while firing performance improves360 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 flames centerNGK Ref. # C6HA, C6HSA, CR6HS, CR6HSA, C7HSA, CR7HS, CR7HSA, C7HVX