Set of 6 x NGK Iridium IX Spark Plugs 3764 BKR6EIX-11 | Premium Performance Upgrade

Upgrade your engine's combustion efficiency, throttle response, and idling stability with a complete matching set of NGK Iridium IX Spark Plugs (Part No. BKR6EIX-11 / Stock No. 3764). Available in convenient 4-pack and 6-pack configurations to perfectly match your vehicle's cylinder count.

Designed specifically for performance enthusiasts and modern high-efficiency engines, the NGK Iridium IX series features an ultra-fine 0.6mm center electrode tip. Iridium is one of the hardest precious metals on earth, allowing for a much thinner tip than standard nickel or platinum plugs. The result is a highly concentrated spark that requires less voltage to fire, ensuring immediate ignitability, fewer misfires under heavy load, and maximum power conversion throughout your entire rev range.

Key Features & Benefits

• 0.6mm Fine-Wire Iridium Tip: Ensures high durability and a consistently stable spark, maximizing flame growth to unlock hidden performance.

• Tapered Ground Electrode: Minimizes "quenching" effects (the metal electrode stealing heat from the flame kernel) for smoother idle and crisper acceleration.

• Pre-Gapped to 1.1mm: Factory calibrated with a wider 1.1mm gap design for optimized fuel-air mixture ignition in specific petrol platforms.

• Superior Anti-Fouling: Special trivalent metal plating provides superior anti-corrosion and anti-seizing properties, keeping the plug clean for up to 80,000 to 100,000 km.

Technical Specifications

• Manufacturer: NGK Spark Plugs (Japan)

• Electrode Material: Premium Iridium

• Thread Diameter: 14 mm

• Thread Reach: 19 mm (3/4")

• Hex Size: 16 mm (5/8")

• Factory Preset Gap: 1.1 mm (.043")

• Heat Range: 6

Which Pack Do You Need?

• Set of 4: Standard fitment for most 4-cylinder Japanese and Korean engines (Honda Civic/Accord, Toyota Corolla, Nissan Pulsar, Mazda 3).

• Set of 6: Perfect for multi-cylinder performance engines (Toyota 1MZ-FE V6, Nissan VQ30DE V6, Mitsubishi 6G72, and non-turbo Subaru H6 platforms).

⚠️ Important Fitment Tip: The "-11" suffix denotes a wide 1.1mm factory gap. If your vehicle is turbocharged, supercharged, or requires a tighter gap layout (like a standard 0.8mm gap found on standard BKR6EIX plugs), running a 1.1mm gap without adjustment may cause spark blowout under boost. Always verify your engine's gap specifications before installing.

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Aftermarket Interchange & Cross-References