grumpyvette
Well-known member
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http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf
www.acdelco.com/html/pi_plugs_ident.htm
http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf
www.acdelco.com/html/pi_plugs_ident.htm