NGK ILKR9G8 Laser Iridium Spark Plug (Stock No. 97168)
This NGK Laser Iridium plug delivers a strong, stable spark for reliable combustion. It suits high-load, high-heat use, such as tuned turbo petrol engines. The fine iridium tip needs less voltage to fire, which helps cold starts and throttle response. The platinum pad on the ground electrode improves lifespan and gap stability.
Use this plug when you need a colder heat range than standard. It helps manage higher cylinder temperatures in performance applications. Always match the heat range to your engine and tune.
- Strong ignition under boost and high RPM
- Better throttle response and cold starting
- Long service life with stable gap control
Fitment: Check vehicle compatibility using our site’s vehicle lookup or the Vehicle Fitment tab before ordering.
| Part Number | ILKR9G8 |
| NGK Stock Number | 97168 |
| GTIN | 87295971680 |
| Category | 686 – Spark Plug |
| Technology | Laser Iridium (iridium centre, platinum ground) |
| Heat Range | 9 (colder than standard for many applications) |
| Resistor | Yes |
| Factory Gap | 0.8 mm |
| Centre Electrode Tip | Fine-wire iridium, approx. 0.6 mm |
| Ground Electrode | Tapered with laser-welded platinum pad |
| Terminal | Solid terminal nut |
| Recommended Use | High-performance petrol engines, including tuned turbo applications |
| Quantity Required | One per cylinder |
Note: Some ECU tunes call for specific gaps or heat ranges. Set the gap to your tuner’s spec if different from factory. Always install to the correct torque for your engine.
The price displayed is for a single plug, please add the desired amount to your basket.


