Description
Enhance the performance and reliability of your BMW engine with the Dinan Iridium Spark Plug, designed for high-performance and high-boost applications. Featuring a heat range 9 specification, this spark plug is constructed with a durable iridium alloy electrode and a copper core to ensure superior thermal conductivity, resistance to pre-ignition, and long-term durability.
With a 12mm thread diameter, 26.5mm thread reach, 14mm bi-hex nut, and flat seat design, this plug is tailored for demanding engine environments. The HV (high voltage/nut terminal) type ensures a secure connection to ignition systems and is an excellent pairing with Dinan ignition coils. This plug is ideal for tuned or modified engines, including BMW's N54, N55, N20, S55, N63/N63TU, and S63/S63TU platforms.
Important Compatibility Note: This plug is 3 steps colder than OEM for N54 engines and 2 steps colder for N55. It is recommended only for tuned or high-boost configurations. Use on stock N54 or N55 engines may result in plug fouling, misfires, and reduced performance due to the inability to reach self-cleaning temperature.
Key Features:
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Heat range 9 for optimized performance in high-temperature, high-pressure conditions
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Iridium electrode with copper core for enhanced durability and spark consistency
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HV terminal (nut style) for high-voltage coil compatibility
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Flat seat, 12mm x 26.5mm thread, 14mm bi-hex nut configuration
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Compatible with ethanol-based fuels (E85 safe)
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Lower voltage requirement with cooler operation than stock plugs
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Projected insulator design for efficient combustion
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Excellent match with Dinan ignition coils
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OEM Cross References: 12120039664, 12120038896, 12120038704
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Manufactured in the EU
Vehicle-Specific Heat Range Details:
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3 steps colder than OEM for N54 engines
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2 steps colder than OEM for N55 engines
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1 step colder than OEM for N20, S55, N63, and S63 engines
