APR Iridium Pro Spark Plugs are the excellent upgrade for tuned engines. APR's 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, can dissipate heat more easily, and 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 9 spark plug (Similar: Bosch 3, Brisk 10, Denso 27 and NGK 9)
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
Projected insulator design
Lower required supplied voltage
Cooler operating temperature than stock plugs
Optimised 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: 19mm
Thread diameter: 14mm
Hexagon: 16mm
Seat Type: Gasket
Install Torque: 25 Nm
Made in the EU
 
Fits:
2005–2019 Audi A3, Audi A4, Audi A5, Audi A6, Audi A7, Audi A8, Audi allroad, Audi Q3, Audi Q5, Audi Q7, Audi S4, Audi S5, Audi SQ5, Audi TT, Audi TTS
Porsche Cayenne, Porsche Panamera
Volkswagen Beetle, Volkswagen CC, Volkswagen Eos, Volkswagen Golf R, Volkswagen GTI, Volkswagen Jetta, Volkswagen Passat, Volkswagen Tiguan, Volkswagen Tiguan Limited, Volkswagen Touareg
 
Note: Suited for PQ35 model vehicles – gapping of spark plugs is essential prior to installation.
 
Part #: Z1003101