Key notes: The World of Outlaws Late Model Series invades I-55 Federated Raceway Park for this weekend’s King of the Arch, starting with Friday’s 40-lap, $12,000-to-win opener. … The two-day program concludes with Saturday’s 55-lap, $20,000-to-win finale. … Points leader Bobby Pierce of Oakwood, Ill., is a five-time feature winner at I-55, including last year’s $12,000 WoO-sanctioned prelim. … Drake Troutman of Hyndman, Pa., topped last year’s $20,000 finale for his first career World of Outlaws victory. … Nick Hoffman of Mooresville, N.C., is fresh off a six-figure payday in Sept. 12’s World 100 at Eldora Speedway. … Shannon Babb of Moweaqua, Ill., grabbed a $5,000 MARS Late Model Series victory there on Aug. 29. … Jason Feger of Bloomington, Ill., is a two-time MARS feature winner there (2013, ’24), worth more than $10,000. … Ryan Gustin of Marshalltown, Iowa, grabbed a $5,000 MARS triumph there in August 2015. … MARS modifieds are on the undercard nightly. … Pits open at 2 p.m. with hot laps at 6:30 daily; grandstands open at 5 for Friday’s opener then 4 for Saturday’s finale. … Watch live on DIRTVision.

Who to watch: Bobby Pierce of Oakwood, Ill., seeks a repeat victory in the WoO-sanctioned weekend opener at I-55.

Points chase: Before I-55 Friday: 1. Bobby Pierce (6,489); 2. Nick Hoffman (6,377); 3. Tyler Erb (6,142); 4. Tim McCreadie (6,070); 5. Ryan Gustin (5,951); 6. Ethan Dotson (5,848); 7. Daulton Wilson (5,765); 8. Trey Mills (5,669); 9. Dennis Erb Jr. (5,650); 10. Dustin Sorensen (5,557).

Expected entrants: Among drivers expected to join the top 10 in series standings: Shannon Babb, Jason Feger, Tanner English, Wil Herrington, Gordy Gundaker, Dallon Murty, Jordan Bauer, Logan Zarin, Tristan Chamberlain, Jeff Herzog, Aaron Marrant, Blaze Burwell, Brent Larson, Kyle Steffens, Austin Howes, Rusty Griffaw, Rickey Frankel, Eli Johnson, Mark Voigt, Tony Wolf and more.

Next series race: September 26, I-55 Federated Raceway Park (Pevely, MO) $20,000