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jbrinkley jbrinkley is offline
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Join Date: Feb 2004
Location: louisiana
Posts: 1,481
I use one step colder on a bosch plug, that's wr6dc, stock is wr7dc.
lower number is colder for bosch
lower number is hotter for NGK

I started with sevens, went to sixes, and ordered fives. But the sixes look good, just looked at them this morning, 300 miles on them.
Old 11-11-2007, 08:55 AM
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