NGK IFR6E11 – Laser Iridium Spark Plug (Stock 6741)
This NGK Laser Iridium plug gives reliable ignition, smooth idle, and long service intervals. The fine iridium tip needs less voltage to spark, which helps cold starts and stable performance under load. It is built for durability with an iridium centre and a platinum-tipped ground electrode.
Use it as a high quality OE-style replacement. It supports stock and mildly tuned engines, but it will not add power by itself. Pair it with a healthy ignition system and correct tuning for best results.
Key benefits
- Precise, consistent spark for cleaner combustion
- Long service life from iridium and platinum electrodes
- Strong performance in cold starts and at high RPM
Technical specifications
| Part number | IFR6E11 |
| NGK stock number | 6741 |
| GTIN | 087295167410 |
| Category | 686 – Spark Plug |
| Type | Laser Iridium, resistor |
| Thread diameter | 14 mm |
| Thread reach | 19 mm |
| Hex size | 16 mm |
| Seat type | Flat seat with gasket |
| Heat range (NGK) | 6 |
| Gap | 1.1 mm (pre-set) |
| Centre electrode | Iridium tip, approx. 0.6 mm |
| Ground electrode | Nickel with platinum pad |
| Terminal | SAE |
| Recommended torque | 18-25 Nm for 14 mm gasket seat |
Fitment guidance
This plug is commonly specified for many Japanese petrol engines that call for an NGK heat range 6, 14 mm thread, 19 mm reach plug with a 1.1 mm gap. Use the site’s vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
The price displayed is for a single plug, please add the desired amount to your basket.


