Description
NGK SILZNAR8C7H Laser Iridium Spark Plug
This NGK Laser Iridium spark plug is built for modern turbocharged, direct-injection petrol engines. It offers strong ignition under high cylinder pressure, stable idle, and reliable performance at sustained motorway speeds. The fine iridium centre electrode needs less voltage to spark, which helps cold starts and keeps misfires down. A platinum-tipped ground electrode improves wear life, so performance stays consistent over more miles.
Use this plug as specified by the vehicle manufacturer or trusted tuning guidance. It suits many high-output petrol engines that call for an NGK heat range 8 plug and a resistor type. Always confirm fitment with the vehicle lookup or the Vehicle Fitment tab.
| Part Number | SILZNAR8C7H |
|---|---|
| NGK Stock Number | 93593 |
| GTIN | 87295935934 |
| Category | 686 – Spark Plug |
| Technology | Laser Iridium (iridium centre, platinum ground) |
| Heat Range | 8 (NGK scale – colder than standard for performance/DI turbo use) |
| Resistor | Yes (reduces electrical noise for ECU and sensors) |
| Electrode Design | Fine-wire centre with tapered ground |
| Gap | Factory set – do not adjust unless specified by OEM/tuner |
| Terminal | As supplied by NGK for OEM coil-on-plug applications |
| Recommended Service Interval | As per vehicle manufacturer or tuning guidance |
- Improved ignition stability under boost and at high RPM.
- Smoother idle and better cold starts.
- Long service life from iridium/platinum precious metals.
Note: Always verify compatibility for your exact engine code and model year. Install to the correct torque on a cold engine and follow OEM gap and replacement intervals.
The price displayed is for a single plug, please add the desired amount to your basket.
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