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Old 01-05-2010, 07:55 AM
  #6  
russ67chevelle
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Join Date: Jan 2005
Posts: 336
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call your head manufacturer for the specific size plug, then everyone is gonna have their own favorite

i run 5671-7 on motor 8s on a small shot nitrous, and 9's for up to a 275 shot, ill never run anyother plug(mostlikely)
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