Thread: Which Spark Plug
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Old 10-24-2008, 07:11 AM
  #6  
zipper06
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RACING JUNKIE
 
Join Date: Jan 2006
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NGK-R5671A-9 for alcohol

NGK-R5671A-8 for gas

Depending on the compression you have you should probably index the plugs just to be on the safe side.

Zip.
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