[mrnickleye]

http://www.answers.com/topic/spark-plug

http://en.wikipedia.org/wiki/Spark_plug

http://www.nightrider.com/biketech/s....htm#discussed

http://www.ngksparkplugs.com/techinf...s/techtips.asp

http://www.edelbrock.com/automotive/sparkplugs.html

http://www.centuryperformance.com/spark.asp