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      01-31-2013, 01:47 AM   #1
Lifted07Duramax
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Drives: 2008 BMW red 335i coupe
Join Date: Jan 2013
Location: springfield, mo

Posts: 1,341
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Whos running the NGK 5992 plug?

Just curious how people are liking the NGK plug that is 1 step colder than stock plugs.
do they notice better performance? Less knock? Better mpg possibly? Even though its good enough
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