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[quote="AlexG"]For some time NGK and Denso have sold plugs with either a "U" grooved bent electrode or a "V" grooved center electrode. Considering these manufacturers are well respected, I assume there must be some measurable benefit to running these sparking plugs. However, can't recall reading any postings on this forum regarding the virtue of these grooves. [b]Is there anyone out there who can actually attest to the supposed benefit of these plugs?[/b] I happen to be using Bosch and or Autolite for no particular reason other than both brands have served me well. Neither offer the "groovy" style plugs. [b]Anyone take their tiny die grinder with jeweler's bit to cut a "v" groove in their plugs? Is it worth the effort? [/b] Thank you in advance.[/quote]
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