Always check sizes, gap, and heat range specs before installing. Installation of the wrong length plug can cause damage to the engine. You must verify this before installing the plug.
B48/B58/S58
Dinan Iridium Spark Plugs are an excellent upgrade for tuned, and even stock engines. Our spark plugs are made from Iridium - one of the strongest materials available. They last longer than other materials with higher melting points, run cooler, resist preignition, and even require less voltage to produce a strong spark. The iridium electrode with its copper core is harder and stronger than other materials, can dissipate heat more easily, and is better protected from melting, cracking, and other limitations found with standard plugs.
Dinan spark plugs are great for high boost, high cylinder pressure, high cylinder temperatures, and high-power situations, and they pair nicely with a set of Dinan ignition coils, where applicable. However, they are not only for tuned and higher output vehicles that may benefit from a plug cooler than the factory heat range – they also are applicable to non-tuned / stock vehicles as well!
The D640-0001 spark plug applies to the following engines: Gen 1 B48, Gen 1 & 2 B58 engines as well as the S58.
Compatible OEM Part #Cross Reference: 12120040551, 12122455258, 12120046646 & 12125A4EF60
Features
Heat range 9 spark plug (Similar: Bosch 3, Brisk 10, Champion 4, Denso 27, and NGK 9)
152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum
Stronger than copper and platinum
Acceptable for high performance / tuned and stock vehicle applications alike
Projected insulator design
Lower required supplied voltage
Cooler operating temperature than stock plugs
Optimized electrode design for hard to ignite fuels, such as ethanol
Resists preignition better than stock plugs
An excellent match for Dinan ignition coils
Thread reach: 26.5mm
Thread diameter: 12mm
Hexagon: 14mm Bi-Hex
Terminal Type: Cup
Seat Type: Flat
Install Torque: 17 Nm
Insulator Material: Ceramic
Supplied Gap: 0.5mm
1 step colder than OEM (Gen 1 B48, Gen 1/2 B58, & S58)
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**Rates from 0%-36% APR. Payment options through Shop Pay Installments, are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers https://www.affirm.com/licenses.
