The 2018 DC Solar 200 was the fourth stock car race of the 2018 NASCAR Xfinity Series season and the 14th iteration of the event.

[1] To fill out the podium, Justin Allgaier of JR Motorsports and Kyle Busch of Joe Gibbs Racing would finish second and third, respectively.

ISM Raceway – also known as PIR – is a one-mile, low-banked tri-oval race track located in Avondale, Arizona.

[2] Christopher Bell of Joe Gibbs Racing would set the fastest lap in the session with a time of 26.892 and an average speed of 133.869 miles per hour (215.441 km/h).

[2] Cole Custer of Stewart-Haas Racing with Biagi-DenBeste would set the fastest lap in the session with a time of 27.393 and an average speed of 131.420 miles per hour (211.500 km/h).