NGK ILFR6B Laser Iridium Spark Plug – Stock No. 6481
This NGK Laser Iridium plug delivers reliable ignition, strong cold starts, and stable idle. The fine iridium centre tip needs less voltage to fire, helping performance and fuel economy. A platinum pad on the ground electrode resists wear for long service life.
It suits engines that specify an NGK heat range 6, M14 x 1.25 thread, and 19 mm reach. Please use the site’s vehicle lookup or check the Vehicle Fitment tab to confirm compatibility.
- Fine-wire iridium centre electrode for efficient spark and smooth running
- Platinum-tipped ground for durability over high mileage
- Built-in resistor to reduce electrical noise for ECU and sensors
| Part number | ILFR6B |
|---|---|
| NGK stock number | 6481 |
| GTIN | 087295164815 |
| Category | 686 – Spark Plug |
| Series | Laser Iridium |
| Thread diameter | M14 |
| Thread pitch | 1.25 |
| Thread reach | 19 mm |
| Hex size | 16 mm |
| Seat type | Flat seat – gasket |
| Heat range | NGK 6 |
| Resistor | Yes |
| Centre electrode | Fine iridium tip, laser-welded |
| Ground electrode | Nickel with platinum pad |
| Terminal type | Solid |
| Gap | Factory set (do not adjust unless specified by the vehicle manufacturer) |
Fitting notes
– Always install to the vehicle manufacturer’s spec for gap, torque, and change interval.
– Fit to a cold engine. Use a new gasket.
– Apply only the recommended torque to avoid damage.
– Replace as a complete set for even performance.
The price displayed is for a single plug, please add the desired amount to your basket.


