NGK Iridium IX spark plugs BKR7EIX 4‑Pack — 14mm, 19mm Reach, 0.6mm Iridium Tip for Turbo 4‑Cyl

NGK 2667 BKR7EIX Iridium IX spark plugs are a four-pack of high‑performance iridium ignition plugs engineered to deliver consistent sparks, long life, and reliable starts for compatible 4‑cylinder engines.

These NGK Iridium IX plugs use a 0.6mm fine‑wire iridium center electrode and a projected alumina silicate insulator to produce a stable, efficient spark while resisting wear at high temperatures. Built with a 14mm thread, 19mm reach and a 0.8mm nominal gap, they replace OE‑style plugs in many Audi, Volkswagen, Buick, Chevrolet and other 2.0L / 1.4L turbocharged engines listed by fitment. The plugs include trivalent metal plating to help prevent corrosion and seizing, corrugated ribs to reduce flashover, and a 5kΩ resistor for radio interference suppression.

Which vehicles and engines will these NGK 2667 plugs fit?

These BKR7EIX plugs are matched to a wide range of modern four‑cylinder engines, especially turbocharged 2.0L Audi/VW engines and 1.4L GM small‑displacement models. Check your vehicle’s owner manual or parts diagram to confirm thread size (14mm), reach (19mm) and heat range (7) compatibility before ordering.

• Common Audi/VW fits: A3, A4, A5, A6, Q3, Q5, TT, TTS, GTI, Jetta, Passat, Tiguan (various model years)
• GM fits: Buick Encore (1.4L), Chevy Cruze, Sonic, Trax (1.4L)
• Key specs: 14mm x 1.25 thread, 19mm reach, 0.8mm gap, hex 16mm

How do Iridium IX plugs affect performance and durability?

Iridium’s very high melting point and fine‑wire center electrode design create a concentrated spark with lower required voltage and slower electrode erosion. The result is more consistent ignition over a longer service life compared with conventional plugs, helping maintain engine efficiency and throttle response.

• 0.6mm iridium center electrode reduces wear and maintains gap integrity
• Projected insulator improves spark exposure for stable combustion
• Trivalent plating and corrugated ribs reduce corrosion and flashover risks

What installation and torque details should I follow?

Proper installation ensures thread integrity and accurate heat transfer. Hand‑start the plug to avoid cross‑threading, use the correct torque spec for the cylinder head material, and set the nominal gap to 0.8 mm if required by your vehicle.

• Torque cast iron head: 18–25.3 lb·ft (24–34.3 N·m)
• Torque aluminum head: 18–21.6 lb·ft (24–29.3 N·m)
• Factory gap: 0.031" (0.8 mm); solid terminal and 5kΩ resistor included

Why choose NGK Iridium IX over standard plugs?

NGK’s Iridium IX line is targeted at drivers and enthusiasts who want extended service intervals and stable ignition under elevated temperatures and loads. While they cost more than copper or nickel plugs, iridium electrodes resist erosion longer and maintain combustion consistency, which can help preserve drivability and emissions control systems.

• Longer electrode life versus conventional plugs
• Consistent spark energy supports modern high‑compression and turbo engines
• Resistor and ceramic design reduce electrical noise and support heat management

Who is this for: This NGK 2667 BKR7EIX 4‑pack is aimed at DIYers, independent shops, and vehicle owners with specific 14mm‑thread 4‑cylinder engines who want a durable, OE‑quality iridium replacement. It’s a good fit for owners of Audi and Volkswagen 2.0L turbo engines and GM 1.4L turbo models seeking longer intervals between spark plug changes and stable spark performance under boost.