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The Green Spark Plug Company£10.84Visit shop Ngk Ifr5t11 4996 Spark Plug Iridium New Ngk-Ifr5t11
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The NGK Iridium Spark Plug 4996 (IFR5T11) is designed for automotive enthusiasts and DIY mechanics who require reliable ignition performance and improved engine starting reliability. Featuring advanced iridium construction, this plug offers exceptional durability and consistent firing under various driving conditions, though users must be careful to verify exact vehicle compatibility before installation to avoid engine performance issues.
| Model Part Number | 4996 |
|---|---|
| Brand | NGK |
It is generally recommended not to gap iridium spark plugs, as the fine center electrode is very delicate and easily damaged.
The center electrode is made from iridium, which provides superior durability and a high melting point.
Follow your vehicle manufacturer's recommended service interval, though iridium plugs typically offer a longer service life than standard plugs.
Spark plugs do not have a set orientation; simply ensure they are screwed in until they seat properly and torqued to spec.
The NGK 4996 is sold as a single unit.
Check that the ignition coil is fully seated on the spark plug and that the gap was not altered during handling.
Verify the spark plug is the correct part for your specific engine code and ensure all electrical connections are secure.
Before installation, verify the compatibility of part number 4996 (IFR5T11) with your vehicle owner's manual or an online parts catalog. When installing, ensure the engine is completely cool to prevent damage to the cylinder head threads. Always use a torque wrench to tighten the plug to the manufacturer's specified torque setting—over-tightening can strip threads, while under-tightening can lead to poor heat dissipation or plug blowout. Avoid cleaning iridium plugs with wire brushes, as this can damage the fine center electrode. If the plug requires replacement due to carbon fouling, it is recommended to replace the entire set to maintain engine balance.
