DNN Spark Plugs

Compatible OEM Part #Cross Reference: 12125A523E0 The D640-0003 spark plug applies to the following engines: B48 TU B58 TU1 (Gen 2 B48 Gen 3 B58) 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! 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 Iridium Spark Plug - 12x26.5x14MM (Flat) - Heat Range 12 (NGK 8).