APR Performance Spark Plugs for Tuned Engines 2.9T / 3.0T EA839, 4.0T EA825, 2.0T / 2.5T / 3.0T / 3.7T 9A2 Z1004081

APR Iridium Pro Spark Plugs

are an excellent upgrade for tuned engines. Our plugs are manufactured from Iridium – one of the strongest materials available for spark plug applications. They run cooler, resist preignition and detonation, have a longer lifespan than plugs made from other materials, and require less voltage to create a strong spark. The electrodes are harder and stronger, dissipate heat more effectively, and are far more resistant to melting, cracking, or breaking off inside the cylinder.

These plugs were designed for use in tuned and high-output vehicles, where each cylinder produces higher power, temperatures, and pressures than stock plugs were designed for.

Ideal for use on Stage 1–3 tuned vehicles and in combination with APR Ignition Coils.

Features:

Heat range 10 spark plug (Similar: Bosch 2, Brisk 8, Denso 31, NGK 10)
152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum
Stronger than copper or platinum electrodes
More robust insulator
Larger spark with the same supplied voltage
Cooler electrode temperature compared to stock plugs
Robust design suitable for use with E85 fuel
Greater resistance to detonation and preignition
Ideal for Stage 1 and higher tuned vehicles
Excellent match with APR ignition coils
Thread reach: 26.5 mm
Thread diameter: 12 mm
Hexagon: 14 mm
Seat type: Gasket
Supplied gap: 0.55 mm ± 0.05 mm
Install torque: 17 Nm
Made in the EU

Packaging:

Sold individually. For a four-cylinder order 4 pcs, for a five-cylinder 5 pcs, for an eight-cylinder 8 pcs, etc.

Applications / Required Quantity:

8x – 4.0T EA825
6x – 2.9T/3.0T EA839
4x – 2.0T 9A2 (Porsche 718)
6x – 3.0T/3.7T 9A2 (Porsche 911, Panamera, Cayenne, Macan)