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.
The D640-0001 spark plug applies to the following engines: Gen 1 B48, Gen 1 & 2 B58 engines as well as the S58.
152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum
Dinan B48/B58/S58 Iridium Spark Plug - Heat Range 9 - 12mm x 26.5mm x 14mm (Flat) - SINGLE
Compatible OEM Part #Cross Reference: 12120040551, 12122455258, 12120046646 & 12125A4EF60
Heat range 9 spark plug (Similar: Bosch 3, Brisk 10, Champion 4, Denso 27, and NGK 9)
Acceptable for high performance / tuned and stock vehicle applications alike
Optimized electrode design for hard to ignite fuels, such as ethanol
Dinan Iridium Spark Plug - 12x26.5x14MM (Flat) - Heat Range 9
1 step colder than OEM (Gen 1 B48, Gen 1/2 B58, & S58)
Cooler operating temperature than stock plugs
Resists preignition better than stock plugs
An excellent match for Dinan ignition coils
Stronger than copper and platinum
Lower required supplied voltage
Insulator Material: Ceramic
SPARK PLUGS FLAT B48B58S58
Projected insulator design
Thread diameter: 12mm
Install Torque: 17 Nm
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
B48/B58/S58
DIN SP
