ive put about 15k on a stock gapped set, no issues APR IS20 87 tuned,
You will be fine if you go with them. Like others have said it's a solid plug and no issues so far with mine.
I run them. They are a good plug.
They are great. Also around 12k miles on mine - no issues.
Yeah I've had these on my 2010 for about 12k miles now. No issues, have been performing just fine.
We used to put Bosch W7DTC spark plugs in them. No gapping required, smoother idle, and they last 60k miles, maybe more.
You can get NGK or Bosch plugs on rockauto for around $10. Not sure which was OEM, some like NGK for Mercedes in general but Bosch tends to be the OEM maker of plugs for MB.
I went with OE ignition coils and bosch spark plugs and the misfire went away for a couple days but came back on my drive to school.
If these are for a TJ (97-05) return them and get NTK (NGK). The 4.0 will not like anything else.
Yeah I own and operate an auto repair facility and refuse to use Bosch plugs because I’ve had a lot of issues with them in the past. Misfires mostly.
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