NGK BP6HS versus B6HS? Differences?

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meowy84

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Jul 18, 2009
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Just wondering about the difference between these two? Since the 6 refers to the heat range they should be the same....so what does the P stand for? platinum?
 

Bikeguy Joe

Godfather of Motorized Bicycles
Jan 8, 2008
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up north now
I believe that is for "projected tip" or the electrode reaches in to the combustion chamber a mm or so further.