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!
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.
Dinan 2025+ BMW Gen2 B48/Gen3 B58 Iridium Spark Plug - Heat Range 9 - 12mm x 26.5mm x 14mm - SINGLE
The D640-0003 spark plug applies to the following engines: B48 TU B58 TU1 (Gen 2 B48 Gen 3 B58)
152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum
Acceptable for high performance / tuned and stock vehicle applications alike
Dinan Iridium Spark Plug - 12x26.5x14MM (Flat) - Heat Range 12 (NGK 8)
Optimized electrode design for hard to ignite fuels, such as ethanol
Compatible OEM Part #Cross Reference: 12125A523E0
Cooler operating temperature than stock plugs
Resists preignition better than stock plugs
Heat range 12 spark plug (Similar: NGK 8)
B48 TU B58 TU1 (Gen 2 B48 Gen 3 B58)
Stronger than copper and platinum
Lower required supplied voltage
SPARK PLUGS GEN3 B58 GEN2 B46
Insulator Material: Ceramic
Projected insulator design
Install Torque: 15 + 25 Nm
Thread diameter: 12mm
Thread reach: 26.5mm
Hexagon: 14mm Bi-Hex
Supplied Gap: 0.5mm
Iridium Spark Plug
Terminal Type: Cup
Seat Type: Flat
Made in the EU
DIN SP
