NGK Iridium IX Spark Plugs BKR7EIX – 4 Pack, 14mm Thread, 0.8mm Gap

NGK 2667 BKR7EIX Iridium IX spark plugs are a four-pack of fine-wire iridium ignition plugs engineered to deliver consistent sparks, long life, and superior corrosion resistance for many 2.0L and 1.4L turbocharged engines.

These plugs are built for modern direct- and port-injected engines that demand a stable ignition source under high temperature and boost. The Iridium center electrode, projected alumina-silicate insulator and trivalent plating work together to reduce wear, resist seizing and help maintain a precise .031" (0.8 mm) gap over time. Each pack contains four NGK BKR7EIX units with a 14mm thread and 19mm reach (3/4"), suitable for a range of Volkswagen, Audi, Buick and Chevrolet models listed for compatibility.

Which vehicles and engines are these NGK Iridium plugs compatible with?

These BKR7EIX plugs fit many 2.0L four-cylinder turbocharged and naturally aspirated engines as well as select 1.4L models. Reference the full fitment list for exact model years before purchasing to confirm fit and thread engagement.

• Audi: A3, A4, A5, A6, Q3, Q5, TT, TTS (various years 2005–2017 for 2.0L engines)
• Volkswagen: Golf, GTI, Jetta, Passat, Tiguan, Beetle, CC, Eos (2.0L and specific turbo variants)
• Buick/Chevy: Encore, Cruze, Sonic, Trax with 1.4L or 1.4L turbo engines
• Always verify OEM part cross-reference and engine code for final fitment

What are the key technical specs I should know before installation?

Understanding the thread size, reach and gap is critical to proper installation and engine performance. These NGK plugs are engineered with a projected insulator and a very fine 0.6 mm iridium center electrode to sustain a stable spark under heat and pressure.

• Thread: 14 mm with 1.25 mm pitch; reach 19 mm (3/4")
• Hex size: 5/8" (16 mm); terminal: solid
• Nominal gap: 0.031" (0.8 mm); center electrode: 0.6 mm iridium
• Heat range: 7; resistor: 5 kΩ; seat type: gasket

How should I torque and handle these plugs to avoid damage?

Correct torque and clean threads prevent misseating and gasket distortion. NGK recommends specific torque ranges depending on the cylinder head material; always use a calibrated torque wrench and apply anti-seize only if the workshop manual specifies.

• Cast-iron head torque: 18–25.3 lb·ft
• Aluminum head torque: 18–21.6 lb·ft
• Ensure proper thread engagement and seat the gasket flat against the head
• Re-check gap only after installation if necessary—manufactured to a nominal 0.8 mm

What performance and durability features set Iridium IX plugs apart?

Iridium alloy and a fine-wire center electrode reduce wear and provide a concentrated, consistent spark. NGK’s trivalent metal plating and corrugated insulator ribs minimize corrosion and flashover, while the solid copper core promotes heat transfer away from the firing tip.

• Fine-wire iridium (0.6 mm) for lasting spark stability and high-temperature resistance
• Trivalent plating resists corrosion and seizing for easier future removal
• Projected alumina-silicate insulator improves dielectric strength and heat management
• 5 kΩ internal resistor reduces electrical noise for sensitive engine electronics

Who is this product for? These NGK BKR7EIX Iridium IX plugs are aimed at drivers and mechanics who want durable, OEM-quality ignition components for turbocharged 2.0L and specific 1.4L engines—particularly owners of Audi, Volkswagen, Buick and Chevrolet models listed in the compatibility table. Choose this four-pack when you want long-lasting spark performance, corrosion-resistant threads, and plug geometry that supports modern engine management systems.