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The NGK ILKR9G8 (97168) Laser Iridium Spark Plug is designed for automotive enthusiasts and maintenance technicians working on high-performance engines, such as those found in the Alfa Romeo Mito. It provides exceptional ignition reliability and electrode durability through advanced laser-welded iridium technology, though users must ensure precise fitment to match the 12mm thread and 26.5mm length specifications to prevent engine damage.
| Model Part Number | 97168 |
|---|---|
| Brand | NGK |
NGK generally recommends against adjusting the gap on iridium plugs, as the fine electrode can be easily damaged. They are usually pre-gapped at the factory.
The middle electrode is constructed from Iridium, which provides high melting points and excellent durability.
Yes, this plug features a gasket seat design, which acts as the seal when tightened correctly.
While it fits vehicles like the Alfa Romeo Mito, you must verify the thread size (12mm) and reach (26.5mm) against your specific engine service manual.
This indicates the internal resistor value, which suppresses electromagnetic interference generated during the ignition process.
Verify that the spark plug wire or ignition coil is fully seated on the fixed SAE connector and check the electrical connection.
Check the gap of the electrode to ensure it remains at factory specifications and inspect the plug for any signs of carbon fouling or oil contamination.
Proper installation is critical for the longevity of the ILKR9G8. Always ensure the engine is completely cool before attempting to remove or install spark plugs to avoid stripping the cylinder head threads. When installing, tighten the plug using a torque wrench according to the manufacturer’s specifications for your vehicle; do not overtighten, as this can crush the gasket seat or damage the thread. Verify that the 12mm thread size and 26.5mm reach are an exact match for your vehicle’s application before installation. Avoid using anti-seize compound unless specifically recommended by the vehicle manufacturer, as NGK plugs often feature a special plating that acts as a lubricant.
