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4⃣ NGK LKAR7BIX-11S Iridium IX Spark Plug
The NGK LKAR7BIX-11S is another strong Iridium IX-style pick I call out for performance-focused drivers who want extreme ignitability and resistance to fouling. It’s designed to deliver a stable spark and efficient combustion, which is exactly what you want when restoring power and smoothness.
Pros
- +Extreme ignitability for reliable ignition
- +0.6 mm fine iridium tip for durability and stable spark
- +Resists fouling with a longer insulator nose design
- +Triple gasket seal helps prevent combustion gas leakage
- +Anti-corrosion and anti-seizing plating for easier service
Cons
- -Not a universal fit—thread and spec must match your engine
- -Typically costs more than standard or platinum plugs
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4⃣ NGK LKAR7BIX-11S Iridium IX Spark Plug
Available on Amazon
External purchase
Highlights
- +Extreme ignitability for reliable ignition
- +0.6 mm fine iridium tip for durability and stable spark
- +Resists fouling with a longer insulator nose design
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