Spark Plug Poll: NGK BKR6E or PFR7Q? Stage 2+, 93 octane
#3
Of course there's a PRF7Q . . .
<ul><li><a href="http://sparkplugs.com/results_cross.asp?pid=PFR7Q&x=0&y=0">http://sparkplugs.com/results_cross.asp?pid=PFR7Q&x=0&y=0</a</li></ul>
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