Spark Plug Adapters....???/
 

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http://www.nhra.net/content/sportsma...7724&zoneid=85





Rules Amendments

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7/30/2009


Stock

Page 104

1: Cylinder Heads, Location: Add to eleventh sentence after "The following are prohibited,": "Spark plug adaptors,"



Super Stock

Page 114

1: Cylinder heads, Location: Add to end of sixth sentence: "Spark plug adaptors prohibited."




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