APR Iridium Pro Spark Plugs are the excellent upgrade for tuned engines. APR 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:
- Heat range 10 spark plug (Similar: Bosch 2, Brisk 8, Denso 31, and NGK 10)
- 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum.
- 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
- 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)
- 1 step colder older than OEM (2.9T/3.0T EA829, 2.0T/2.5T/3.0T/3.7T 9A2)
- Made in the EU
Fitment/Applications:
- 2018-2025 Audi B9/B9.5 S4 3.0T
- 2018-2025 Audi B9/B9.5 S5 3.0T
- 2018-2025 Audi B9/B9.5 SQ5 3.0T
- 2018-2025 Audi B9/B9.5 RS5 2.9T
- 2018+ Audi C8 A6 3.0T
- 2018+ Audi C8 S6 2.9T
- 2018+ Audi C8 RS6 4.0T
- 2018+ Audi C8 A7 3.0T
- 2018+ Audi C8 S7 2.9T
- 2018+ Audi C8 RS7 4.0T
- 2018+ Audi 4M Q7 3.0T
- 2020+ Audi 4M SQ7 4.0T
- 2020+ Audi 4M Q8 3.0T
- 2019+ Audi 4M SQ8 4.0T
- 2020+ Audi 4M RSQ8 4.0T
- 2019+ Audi D5 A8 3.0T, 4.0T
- 2020+ Audi D5 S8 4.0T
- 2019+ Porsche Macan 2.9T, 3.0T
- 2019+ Porsche Cayenne 2.9T, 3.0T, 4.0T
- 2017+ Porsche Cayman 718 2.0T, 2.5T
- 2017+ Porsche Boxster 718 2.0T, 2.5T
- 2017+ Porsche Panamera 2.9T, 3.0T, 4.0T
- 2020+ Porsche 911 3.0T, 3.7T
- 2018+ Lamborghini Urus 4.0T
- 2019+ Bentley Bentayga 3.0T, 4.0T
- 2020+ Bentley Continental 4.0T
- 2021+ Bentley Flying Spur 2.9T, 4.0T