The 2018 EcoBoost 300 was the 33rd and final stock car race of the 2018 NASCAR Xfinity Series season, the championship race of that year, and the 24th iteration of the event. The race was held on Saturday, November 17, 2018, in Homestead, Florida at Homestead–Miami Speedway, a 1.5 miles (2.4 km) permanent oval-shaped racetrack. The race took the scheduled 200 laps to complete. At race's end, JR Motorsports driver Tyler Reddick would take the lead after cunning pit strategy late in the race to win his first career NASCAR Xfinity Series championship, his 3rd win of his career in the series, and his second and final win of the season.[1]
The first practice session was held on Friday, November 16, at 2:35 PM EST, and would last for 50 minutes.[6]Christopher Bell of Joe Gibbs Racing would set the fastest time in the session, with a lap of 32.298 and an average speed of 167.193 miles per hour (269.071 km/h).[7]
The second and final practice session, sometimes referred to as Happy Hour, was held on Friday, November 16, at 5:05 PM EST, and would last for 50 minutes.[6]Ryan Reed of Roush Fenway Racing would set the fastest time in the session, with a lap of 32.442 and an average speed of 166.451 miles per hour (267.877 km/h).[7]
Qualifying was held on Saturday, November 17, at 12:35 PM EST.[6] Since Homestead–Miami Speedway is under 2 miles (3.2 km), the qualifying system was a multi-car system that included three rounds. The first round was 15 minutes, where every driver would be able to set a lap within the 15 minutes. Then, the second round would consist of the fastest 24 cars in Round 1, and drivers would have 10 minutes to set a lap. Round 3 consisted of the fastest 12 drivers from Round 2, and the drivers would have 5 minutes to set a time. Whoever was fastest in Round 3 would win the pole.[8]
Cole Custer of Stewart-Haas Racing with Biagi-DenBeste would win the pole after advancing from both preliminary rounds and setting the fastest lap in Round 3, with a time of 28.523 and an average speed of 189.321 miles per hour (304.683 km/h).[9]