Herbst, 19, will drive Joe Gibbs Racing’s No. 18 Toyota in his only start for the team this season.
Advance Auto Parts will sponsor the car.
A second-year member of the NASCAR Next program, the Las Vegas native has driven for JGR in ARCA the last two seasons, earning one win, nine top fives and 15 top 10s in 27 starts. He was named Rookie of the Year last season.
Herbst’s win came in June 2017 at Pocono Raceway when he triumphed over Brandon Jones, who is now his teammate at JGR.
Sunday’s race marks Herbst’s first start in any of NASCAR’s three national series. He has made 20 combined starts in the K&N Pro Series East and West Series.
“I am super pumped to be making my first top-three NASCAR series start this weekend at Iowa Speedway,” Herbst said in a press release. “We are coming into the week with expectations of learning every single lap, in hopes of having our Toyota Camry up front by the end of the race. Iowa is a super cool track with a lot of racing lines so should be a great weekend for this No. 18 team.”
Herbst has one start at Iowa in a combined K&N West and East race. He started fifth and finished sixth in July 2016.