Entry List : Las Vegas Motor Speedway
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- Las Vegas Motor Speedway
- Inaugural DC Solar 300
- Pole Winner: Cole Custer
- Age: 20
- Team : No. 00 - Code 3 Associates Ford
- Owner: Stewart-Haas Racing
- Crew Chief: Jeff Meendering
- Cole Custer won the Pole Award for the Inaugural DC Solar 300 with a lap of 30.118 seconds, 179.295 mph.
- This is his fifth pole in 64 NASCAR XFINITY Series races.
- This is his fifth pole and 21st top-10 start in 2018.
- This is his first pole in three races at Las Vegas Motor Speedway.
- Austin Cindric (second) posted his 14th top-10 start of 2018 and his first in two races at Las Vegas Motor Speedway.
- Elliott Sadler (third) posted his seventh top-10 start at Las Vegas Motor Speedway. It is his 18th in 26 races this season.
- Austin Cindric (second) was the fastest qualifying rookie.
- Drivers Entered: 40 (2 drivers will not make the race)
- Laps Scheduled: 200
- Margin of Victory: 01.629 Seconds
- Time of Race: 2 Hours 30 Minutes 56 Seconds
- Average Speed: 119.258
- Cautions: 8 for 40 laps
- Lead Changes: 11
- Green Flag Passes: 1,097 (6.9 passes per green flag lap)
- Las Vegas Motor Speedway
- Inaugural DC Solar 300
- Race Winner: Ross Chastain
- Age: 25
- Team : No. 42 - DC Solar Chevrolet
- Owner: Chip Ganassi Racing
- Crew Chief: Mike Shiplett
- Ross Chastain won the Inaugural DC Solar 300, his first victory in 132 NASCAR XFINITY Series races.
- This is his first victory and seventh top-10 finish in 2018.
- This is his first victory and first top-10 finish in five races at Las Vegas Motor Speedway.
- Justin Allgaier (second) posted his eighth top-10 finish in nine races at Las Vegas Motor Speedway. It is his 21st top-10 finish in 2018.
- Cole Custer (third) posted his second top-10 finish in three races at Las Vegas Motor Speedway.
- Christopher Bell (fourth) was the highest finishing rookie.
- Justin Allgaier leads the point standings by 44 points overCole Custer.
