More information is available at www.centralarizonaspeedway.com and on Facebook. On Saturday, the pits open at 3 p.m., the grandstand opens at 4 p.m. and racing is at 6 p.m. Pit gates open at 4 p.m., the front gate opens at 5 p.m. and racing starts at 7 p.m. on Friday. CASA GRANDE, Ariz. – A top check of $3,000 is at stake for IMCA Modifieds on the third and final night of Central Arizona Speedway’s Desert Thunder Nationals. All three features are 2020 Fast Shafts All-Star Invitational ballot qualifying events. An open practice runs from 6-9 p.m. on Thursday, Nov. 21. The pit area opens at 4 p.m. and the front gate opens at 5 p.m. Pit passes are $25. And on Sunday, pits open at 10 a.m., the front gate opens at 11 a.m. and racing gets underway at 1 p.m. Karl Kustoms Northern SportMods race for $500 to win Friday and Saturday and for $1,000 to win on Sunday. Friday, Nov. 22 and Saturday, Nov. 23 features at Casa Grande both pay the Modified winner $1,000. The Sunday, Nov. 24 feature pays $1,500 to the runner-up and $1,000 for third. Grandstand admission is $20 for adults and free for kids ages 11 and under. Pit gate admission is $35 for adults, $20 for kids 7-11 and free for six and under. IMCA legal mufflers are required.