NGK IFR5J11 Iridium Spark Plug – Stock No. 7418
The NGK IFR5J11 is a premium iridium spark plug designed for consistent ignition, smooth running, and long service life. Its fine-wire iridium centre electrode needs less voltage to spark, which helps cold starts, reduces misfires, and keeps performance stable under load. It is a resistor plug to cut electrical noise that can affect the ECU and sensors.
Use our vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
- Sharper, more reliable spark for smooth idle and clean throttle response
- Durable iridium tip for long life and stable performance over time
- Resistor design helps protect electronics and reduces radio interference
| Specification | Value |
|---|---|
| Part Number | IFR5J11 |
| NGK Stock Number | 7418 |
| GTIN | 87295174180 |
| Category | 686 – Spark Plug |
| Technology | Iridium fine-wire centre electrode |
| Resistor | Yes |
| Heat Range | 5 (NGK scale) |
| Factory Gap | 1.1 mm |
Fitting and use
Install as a set for even performance across cylinders. Check and set the gap to 1.1 mm if your engine spec requires it. Torque to your vehicle’s specification to avoid damage. If your engine is tuned or boosted, follow the tuner’s guidance on plug heat range and gap.
The price displayed is for a single plug, please add the desired amount to your basket.


