64 Speedway
Central Mississippi Speedway
Clayhill Motorsports Park
Columbus Speedway
I-30 Speedway
Jackson Motor Speedway
Malden Speedway
Milan Speedway
Moulton Speedway
North Alabama Speedway
North Mississippi Speedway
Riverside Speedway
St. Francois County Speedway
Volunteer Speedway
Whynot Motorsports Park
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For immediate release: Atlanta, GA - January 30, 2018 - After 21 years with the same wing rule, the United Sprint Car Serie presented by K&N Filters has made a minor change to the TOP WING Wicker Bill rule. The rule change which takes effect with the first race of the 2018 season on February 9th and 10th at Bubba Raceway Park reads as follows: RULE VII A. The Top Wing: can be no more than 25 square feet Maximum with a 2.5" maximum dip measured in front of wicker bill turnup (Maximum 1" Wicker Bill turnup at rear of top wing).
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