SKU#: IZFR6K-11S

Upgrade your Honda’s performance with the NGK 5266 IZFR6K-11S Laser Iridium Spark Plug, a high-precision solution engineered for longevity, ignition efficiency, and power. Built for the performance-minded driver, this iridium spark plug features a fine-wire center electrode that maintains consistent, stable sparks in all driving conditions.

This NGK iridium spark plug uses iridium for its center electrode—an alloy with an extremely high melting point, which is ideal for today’s high-output engines. The platinum ground electrode adds long-life reliability, while the trapezoidal design enhances ignitability. From cold starts to wide-open throttle, it provides peak combustion and throttle response for your Honda Civic, compatible with any model from 2006 to 2011.

Its triple-seal system prevents leaks, and the trivalent metal plating fights off corrosion and seizing. Corrugated ribs along the insulator body eliminate flashover risks, while a copper core improves heat dissipation. This is true OEM FACTORY IRIDIUM performance at its finest.

Key Features:

• Fine-wire 0.6mm iridium spark plug electrode

• Platinum ground electrode with trapezoid design

• Triple-sealed for leak prevention

• High-strength alumina ceramic insulator

• 100,000-mile service life

Specifications:

• Thread: 14mm | Pitch: 1.25mm | Seat: Gasket

• Reach: 19mm (3/4") | Hex: 5/8" (16mm) | Gap: .043" (1.1mm)

• Heat Range: 6 | Resistor: Yes (5k Ohm)

• Torque: 18–25.3 lb. ft. (cast iron) / 18–21.6 lb. ft. (aluminum)

Vehicle Fitment compatibility:

• 2006–2011 Honda Civic 

When performance, durability, and factory-spec reliability matter, trust the PLUG BY NGK, a leader in iridium spark plugs for decades.