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Better Metals Mean Better Spark Plug Designs- Six times harder than platinum, iridium doesn’t melt in temperatures up to 4,000°F
- Because the iridium electrodes of these plugs can be shrunk to only 0.4mm, voltage requirements decrease while firing performance improves
- 360° laser welding of electrode provides a seal that resists wear even in the worst conditions
- Ground electrode features a tapered cut and U-groove that form a large volume area for the flame's center
- Use NGK cross-reference chart to order and stock these plugs
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