6725-115, or Denso Iridium
Thread Starter
Mad Man
Joined: Jan 2002
Posts: 2,758
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From: Big Island Hawaii
6725-115, or Denso Iridium
Senior Member
Joined: Oct 2002
Posts: 524
Likes: 0
From: ENGLAND, UK
Carl I can't directly answer your question but as no one else has chimed I can only give my experience with NGK Iridum part no:R7420-11 which I use. from my t51r running 1.4 bar boost pump fuel & water injection. They work well I never have starting/fouling issues with these either. I only use my car for driving hard and I find after approx 2,500 miles that the tip wears a bit. Not excessive but noticeable. I change mine every 2,500 miles so cannot tell you how well they last if your using them for longer durations before changing them.
