APR Iridium Pro Spark Plugs - 12x26.5x14mm - Heat Range 10 - Z1004081

APR Iridium Pro Spark Plugs are the excellent upgrade for tuned engines. Our spark plugs are made from Iridium, which is one of the strongest materials you can use in this type of application. They run cooler, resist preignition, last longer than other materials with higher melting points, and even require less voltage to produce a strong spark. The electrode is harder and stronger than other materials and with its copper core can dissipate heat more easily, is better protected from melting, cracking, and other limitations found with standard plugs. These plugs were designed for use on tuned and higher output vehicles that benefit from a plug cooler than the factory heat range. They are great for high boost, high cylinder pressure, high cylinder temperatures, and high power situations, and they pair nicely with a set of APR ignition coils, where applicable.

Features & Benefits

• Heat range 10 spark plug (Similar: Bosch 2, Brisk 8, Denso 31, and NGK 10)
• Perfect for upgraded APR vehicles
• An excellent match for APR ignition coils
• Thread reach: 26.5mm
• Thread diameter: 12mm
• Hexagon: 14mm
• Seat Type: Gasket
• Install Torque: 17 Nm
• Insulator Material: Ceramic
• Supplied Gap: .55mm +- .05mm
• 2 steps colder than OEM (4.0T EA825)
• 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum.
• 1 step colder older than OEM (2.9T/3.0T EA829, 2.0T/2.5T/3.0T/3.7T 9A2)
• Made in the EU
• Stronger than copper and platinum
• Designed for high performance / tuned vehicle applications
• Non-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