B48/B58/S58.
Dinan Spark Plugs Iridium are an upgrade excellent for tuned and stock engines.
Made from Iridium, one of the strongest materials available, they last longer than other materials with higher melting points, run cooler, resist preignition, and require less voltage to produce a strong spark.
The electrode iridium 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 plugs spark are great for high boost, high cylinder pressure, high cylinder temperatures, and high-power situations, and they pair nicely with a set of ignition coils Dinan, where applicable.
However, they are applicable not only for tuned and higher output vehicles that may benefit from a plug cooler than the factory heat range – they also are for non-tuned / stock vehicles as well!
The spark plug D640-0001 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.
Always check sizes, gap, and heat range specs before installing.
Installing the wrong length plug can cause damage to the engine.
You must verify this before installing the plug.
