NGK ILZNAR8A7G Laser Iridium Spark Plug (Stock No. 91924)
The NGK ILZNAR8A7G is a Laser Iridium spark plug designed for reliable ignition under high load and high temperature. It helps cold starts, keeps idle smooth, and supports consistent power in tuned or factory turbo petrol engines.
A fine-wire iridium centre electrode needs less voltage to spark. This improves ignition stability, especially in direct-injection turbo engines. A platinum-tipped ground electrode resists wear, so performance stays steady over a long service life.
Use this plug when you want strong ignition, good knock resistance, and durability on fast road or track. It suits many modern high-output petrol engines. Always confirm fitment for your exact vehicle using our lookup or the Vehicle Fitment tab.
| Part Number | ILZNAR8A7G |
| NGK Stock Number | 91924 |
| Category | 686 – Spark Plug |
| GTIN | 87295919248 |
| Series | Laser Iridium |
| Heat Range | 8 (NGK scale) |
| Electrode Design | Fine-wire iridium centre with platinum ground pad |
| Resistor | Yes |
| Pre-set Gap | 0.7 mm |
| Intended Use | Modern high-output petrol, including direct-injection turbo applications |
- Improves ignition reliability under boost and at high RPM.
- Helps reduce misfires and maintains smooth idle.
- Long service life thanks to iridium and platinum wear surfaces.
Do not alter the factory-set gap unless the engine manufacturer specifies otherwise.
The price displayed is for a single plug, please add the desired amount to your basket.



