Seller notes

The *4-PACK* NGK 3521 Iridium IX Spark Plug CR9EIX is a set of high-quality spark plugs designed for direct replacement in automotive ignition systems. Featuring a ground electrode tip design of Taper Cut and a center electrode tip material of Iridium, these spark plugs offer improved performance and durability. With a thread diameter of 10.00 mm and a reach of .75 in, they are compatible with various vehicle models. The removable nut electrical terminal type allows for easy installation and rem...

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