Description
Upgrade your ignition system with the Dinan Iridium Spark Plug, engineered for high-performance and tuned engines, yet fully compatible with stock applications. Designed with a heat range of 9, this spark plug is ideal for engines running higher boost pressures, increased cylinder temps, and high horsepower levels. Featuring a durable iridium construction with a copper core, it offers superior resistance to pre-ignition, higher thermal conductivity, and a longer service life than standard copper or platinum plugs.
With a flat seat, 12mm thread diameter, and 26.5mm thread reach, this precision spark plug ensures reliable combustion under the most demanding conditions. Its projected insulator and optimized electrode geometry improve ignition efficiency and enhance performance with hard-to-ignite fuels like ethanol or E85. Dinan spark plugs require less voltage to produce a stronger spark and operate at cooler temperatures—making them an ideal match for both stock engines and high-output builds.
Perfect for BMW Gen 1 B48, Gen 1 & 2 B58, and S58 engines, this plug is also an excellent pairing with Dinan Ignition Coils for maximum ignition performance.
Key Features:
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Heat Range 9 – Ideal for high-performance and forced induction engines
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Iridium with copper core – Stronger than platinum and copper, cooler operation
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Projected insulator design for enhanced ignition efficiency
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Lower voltage requirement and resistance to pre-ignition
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OEM-Compatible Cross References: 12120040551, 12122455258, 12120046646, 12125A4EF60
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Thread Size: 12mm x 26.5mm | Hex Size: 14mm Bi-Hex
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Seat Type: Flat | Gap: 0.5mm | Torque Spec: 17 Nm
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One step colder than stock for Gen 1 B48, Gen 1/2 B58, and S58 engines
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Made in the EU
Note: Always verify fitment, reach, and heat range before installation. Installing the incorrect spark plug can cause engine damage.
The standard shipping rate applies to orders within the continental United States. If you intend to place an order outside of the continental US, please reach out to support@x-ph.com for assistance.
