APR Iridium Pro Spark Plug

APR Iridium Pro was designed as a serious upgrade for tuned and high-performance engines where the standard spark plug is no longer sufficient. This model is intended only for Big Turbo configurations, where high boost, high cylinder pressure, and high temperatures require a colder and more durable spark plug.

Made of iridium, this spark plug offers significantly higher strength and thermal resistance compared to standard materials. Iridium runs cooler, lasts longer, requires lower voltage for a strong spark, and is much more resistant to pre-ignition.

Key advantages:

• Heat Range 9

(approximately equivalent to: Bosch 3 / Brisk 10 / Denso 27 / NGK 9)

• Suitable for high performance / tuned vehicle applications

• 152% higher melting point than silver

• 125% higher melting point than copper

• 38% higher melting point than platinum

• Stronger than copper and platinum

• Projected insulator design

• Requires lower voltage for ignition

• Runs cooler than standard spark plugs

• Optimized electrode for harder-to-ignite fuels like ethanol

• Better resistance to pre-ignition compared to OEM spark plugs

• Excellent choice for APR tuned vehicles

• Perfectly combined with APR ignition coils

Technical specifications:

• Thread reach: 19 mm

• Thread diameter: 14 mm

• Hex: 16 mm

• Seat type: Gasket

• Install torque: 25 Nm

• Made in the EU

⚠️ Sold individually

⚠️ For Big Turbo applications only

An ideal choice for cars with large turbos, high boost, and serious power goals, where maximum stable spark and higher thermal resistance are required.