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Denso 5303 Spark Plug
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