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Spark plug question

Joined
Aug 18, 2006
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#1
Just sort of a general question about NGK spark plugs. How do you decode them. Like what does a br8es mean, how is it different the a br8eg. I know the number is the heat range but about the rest?
 
Joined
Jun 9, 2007
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#4
yah all that is is the definition of the temp range like a br8 is medium and br9 is hot and br7 is cold.