Attention Pro Stock tractor competitors:
The following 2010 rules that were made in September have been reversed:
1. Change Pro Stock cubic inch limit to 600 cubic inch in the year 2010.
2. Pro stock Turbo limitations use 4.6” max compressor wheel with NTPA sealed turbo in 2010
This means the rules will be the same as 2008 and 2009 for the 10,000 lb Pro Stock class
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