WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.The Dinan Iridium Spark Plugs (D640-0002) are an excellent upgrade for tuned, and even stock engines where applicable, providing a stronger and more consistent spark. Our spark plugs are made from Iridium, one of the strongest materials available, offering a 152% higher melting point than silver and a 38% higher melting point than platinum.
With up to 10% more energy output than stock, these plugs are ideal for high boost, high cylinder pressure, and high-power situations. The iridium electrode, with its copper core, runs cooler, resists preignition better than stock, and requires less voltage to produce a strong spark. They are applicable to the following engines: N20, N54, N55, S55, N63/N63TU, & S63/S63TU**.
Features:
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Cooler Operating Temperature: Runs cooler than stock plugs, resisting preignition better in high-performance applications.
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Increased Energy Output: Provides up to 10% more energy output than stock for a stronger, more consistent spark.
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Superior Material: Made from Iridium, offering superior strength and heat resistance for a longer lifespan.
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Precision Specs: Heat range 9 spark plug (similar to NGK 9). Features a 26.5mm thread reach and 12mm thread diameter, and an optimized electrode design for hard-to-ignite fuels like ethanol.
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Performance Match: An excellent match for Dinan ignition coils.
Product Contains:
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(1) Dinan Iridium Spark Plug (Heat Range 9 - Sold Individually)
Important Note: N54 (3 steps colder) & N55 (2 steps colder) Compatibility: These plugs are NOT suggested for non-tuned stock N54/N55 vehicles, as they will not reach the self-cleaning temperature, leading to fouling and misfires. They are intended for tuned, high boost, and/or upgraded turbo applications for these specific engines. Always check sizes, gap (Supplied Gap: 0.5mm), and heat range specs before installing.
Warranty This product is supported by a Manufacturer's Warranty. Note: Manufacturer warranty terms are subject to change.
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