NGK GR4IX Iridium IX Spark Plug – 97382
The NGK GR4IX is a high-quality Iridium IX spark plug designed for reliable ignition and long service life. It uses a fine iridium tip to create a strong, consistent spark. This helps cold starts, throttle response, and smooth running, especially under load.
Iridium resists wear, so the spark plug stays in good condition for longer than standard copper plugs. It also needs less voltage to fire, which supports stable performance in tuned engines and daily drivers alike.
- Sharper spark for better combustion and throttle response
- Improved cold starting and idle stability
- Durable iridium tip for long life and consistent gap
Note: Heat range is NGK 4 (hotter plug). Choose the correct heat range for your engine and use case.
Use the site’s vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
Technical specifications
| Part number | GR4IX |
| NGK stock number | 97382 |
| GTIN | 87295973820 |
| Category | 686 – Spark Plug |
| Series | Iridium IX |
| Resistor | Yes (R) |
| Heat range | 4 (NGK scale) |
| Centre electrode material | Iridium alloy |
| Centre electrode tip diameter | Approx. 0.6 mm |
| Ground electrode | Nickel alloy, tapered cut |
| Spark gap | Factory set – do not adjust unless specified by the manufacturer |
| Sealing | Tapered/washer seat as per application – confirm by vehicle |
The price displayed is for a single plug, please add the desired amount to your basket.


