The minimum valve stem diameter rule for the Big 8 Late Model Series and Rockford Speedway Late Models has been ammended after further research. The new rule now states: In 2014 and beyond, only 3/8”, 5/16” or 11/32” valve stem diameter allowed. Please see the updated rules as available at www.big8series.com and www.rockfordspeedway.com for complete details.
This article was posted to the website on January 10th, 2013
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