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Old 12-29-2004, 10:02 AM   #1
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Default NGK TR55 plugs

About how manny Miles can you get out of a set of NGK TR55 plugs before its time to replace them ??? :P
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Old 12-29-2004, 11:22 AM   #2
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A long time if your not worried about performance a little.
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Old 12-29-2004, 12:51 PM   #3
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why would they be bad for performance?
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Old 12-29-2004, 01:06 PM   #4
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If you have a strong ignition, they don't lose power within a year. After a year, i'd replace them. Whether that is required or not, I don't know, but that'* what I would do.


-justin
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Old 12-29-2004, 01:19 PM   #5
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I replace mine twice a year, but could probably leave them in longer. Gap them at .055"
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Old 12-29-2004, 01:56 PM   #6
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I didn't know high performance plugs need to be replaced so often.
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Old 12-29-2004, 02:17 PM   #7
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If they are the IX Iridium type, they will last for about 100,000 kms.
It'* not difficult to remove them and check them every year just to analyse condition and gap.
I checked mine after a year and they are perfect.
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