Denso (5319) IW31 Iridium Power Spark Plug, (Pack of 1)

0.4 mm iridium center electrode: world's smallest diameter that maximizes firing potential U-groove and taper cut ground electrode: provides faster spark flame growth and lessens heat quenching DENSO patented 360 degree laser welding process: ensuring exceptional quality bond and structural strength with the iridium center electrode DENSO patented 360 degree laser welding process: ensuring exceptional quality bond and structural strength with the iridium center electrode

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