NGK IZKR7B Iridium Spark Plug – Stock No. 7563
The NGK IZKR7B is a high-quality iridium spark plug designed for reliable ignition under everyday driving and mild performance use. It delivers a strong, stable spark for clean combustion, smoother idle, and consistent power. Iridium’s fine-wire centre electrode needs less voltage to fire, which helps cold starts and reduces misfires. It also lasts longer than standard copper plugs.
Use this plug to restore lost performance, improve throttle response, and maintain efficiency. It is also a safe choice for lightly tuned petrol engines that stay within manufacturer heat range guidance.
Always check your vehicle’s fitment in our lookup or the Vehicle Fitment tab before ordering.
Key benefits
- Fine-wire iridium tip for a strong, consistent spark
- Long service life and stable performance over time
- Resistor design to reduce electrical interference with the ECU
- OEM-grade sealing and corrosion-resistant shell
| Part number | IZKR7B |
|---|---|
| NGK stock number | 7563 |
| GTIN | 87295175637 |
| Category | 686 – Spark Plug |
| Heat range | 7 (NGK scale) |
| Centre electrode | Iridium fine-wire |
| Ground electrode | Nickel alloy |
| Resistor | Yes |
| Thread diameter | 12 mm |
| Thread reach | 26.5 mm |
| Seat type | Gasket |
| Hex size | 14 mm |
| Factory gap | 0.8 mm (preset – adjust only if specified by the manufacturer) |
| Terminal | Solid |
Fitment guidance
This plug suits selected modern petrol engines that specify NGK IZKR7B. For example, some Japanese and European 4-cylinder applications use this 12 mm, long-reach, gasket-seat iridium plug. Use our vehicle lookup to confirm exact fitment, or check the Vehicle Fitment tab for full details.
Installation notes: Fit to a cool engine. Do not use anti-seize on plated NGK shells. Torque to the manufacturer spec. Only adjust the gap if your vehicle’s service data requires it.
The price displayed is for a single plug, please add the desired amount to your basket.


