Spark Plug Denso Iridium IK24 5VZ 3.4 Liter Sold Each
These 3 step colder plugs are recommended by URD if you are running the 7th Injector and 2.1 pulley upgrade on a Supercharged 5VZ engine.
If you are running the stock pulley (Low Boost) on the 5vz supercharger, Magnuson recommends staying with the stock heat range spark plug.
IRIDIUM POWER! A new generation of high performance spark plug that uses the worlds smallest irirdium electrode that is a mere 0.4mm in diameter! The smaller the electrode, the more concentrated the electric potential at the electrode. The stronger the electric field, the lower the required voltage. As a result, combustion is good for all types of driving, the engine starts easily, and acceleration improves.
6 are required for the 5VZ
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