APR Iridium Pro Spark Plugs - 14x19x16mm - Heat Range 9

Always check sizes and heat range specs before installing.

Fits Various Audi A3, A4, A5, A6, A7, A8, allroad, Q3, Q5, Q7, S4, S5, SQ5, TT, TTS; Porsche Cayenne, Panamera; Volkswagen Beetle, CC, Eos, Golf R, GTI, Jetta, Passat, Tiguan, Touareg​

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, 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.

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

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: 19mm

Thread diameter: 14mm

Hexagon: 16mm

Seat Type: Gasket

Install Torque: 25 Nm

Made in the EU