OEM manufactures select appropriate spark plugs for the engine and vehicle type, so use the specified spark plugs.

I: High- performance spark plugs
X: Shape [type, IRIDIUM POWER]
W: Thread diameter and hex size
R: Internal Construction
16: Heat range
U: Shape [type]
E: Reach
11: Gap

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*Reach 19, +ISO type, **Reach 12.7

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« Hot Type  |  Cold Type »

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