Key notes: The Valvoline American Late Model Iron-Man Series concludes its Great Lakes State doubleheader with Sunday’s 40-lap, $10,000-to-win finale at Crystal Motor Speedway. … Saturday’s middle stop at nearby Butler Motor Speedway in Quincy, Mich., rained out. … Tyler Erb of New Waverly, Texas, led all 40 laps in winning Friday’s weekend opener at nearby I-96 Speedway in Lake Odessa, Mich., worth $10,000. Terbo topped last May’s Iron-Man field for a $7,500 payday at Crystal after winning 2024’s $10,000 DIRTcar Summer Nationals stop there. … Rusty Schlenk of McClure, Ohio, the 2024 Iron-Man champ, seeks his first series win of the 2026 season. … Travis Stemler of Ionia, Mich., won last June’s $11,000 Dan Salay Memorial in unsanctioned competition. … Dona Marcoullier of Houghton Lake, Mich., earned a $4,000 unsanctioned win there last fall. … Chad Finley of St. Johns, Mich., grabbed a $4,000 unsanctioned victory in the fall of 2024. … Modifieds and stock cars are on the undercard. … Pits open at 2 p.m. and grandstands open at 4 with hot laps at 6:30. … Watch live on Crystal Motor Speedway TV. … Crystal’s Saturday night sprint car show was cancelled because of rain.

Who to watch: Tyler Erb of New Waverly, Texas, eyes his second win of the weekend and second straight Iron-Man victory at Crystal.

Points chase: Before Crystal: 1. Colten Burdette (316); 2. Rod Conley (301); 3. R.J. Conley (293); 4. Seth Daniels (263); 5. Miles Cook II (261).

Expected entrants: Tyler Erb, Travis Stemler, Dona Marcoullier, Rusty Schlenk, Ashton Winger, Chad Finley, Colten Burdette, Devin Shiels, R.J. Conley, Trey Mills, Rod Conley, Seth Daniels, Brandon Thirlby, Luke Morey, Cody Bauer, Rylee Knoll, Brayden Shiels, Collin Shipley, Dusty Moore, Logan Nickerson, Rob Anderzack, Derrick Hilliker, Bill Bray, Chase Burda, Travis Carr, Miles Cook II and others.

Next series race: June 12, West Virginia Motor Speedway (Mineral Wells, WV) $12,000