Spark plug Denso or OEM Volkswagen

Denso Spark plug

After I replaced mk Denso Iridium IK22's with the bosch coppers the problem disappeared. It looked as if the electorodes on 2 of the Denso's were oddly eroded and were probably causing a misfire.

Pros: problem disappeared
Cons: electrodes oddly eroded
Part number: IK22
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Denso Spark plug
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Rating 4.0

I was useing the Bosch +2's for about 4 months and switched them out for the Denso Iridium's, could definitely tell a difference.

Pros: noticeable difference
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