The Dover 400 (last held as the Drydene 311) was a NASCAR Cup Series stock car race held annually at Dover International Speedway in Dover, Delaware from 1971 to 2020 It was the second of two Cup Series races at the 1-mile concrete oval during that time. Held in the fall, the race was part of the NASCAR playoffs from their start in 2004 until 2020, when the race was moved to the penultimate weekend of the regular season. However, that event then became part of a doubleheader with the rescheduled spring race in August due to the COVID-19 pandemic. The race length was also shortened to 311 miles for both events. The race was left off of the schedule in 2021 as Dover Motorsports, the track's owner, elected to move one it's two dates to Nashville Superspeedway as part of a schedule realignment. Past winners Notes 1997: First year the race was shortened to . 2005 and 2018: Race extended due to a NASCAR Overtime finish. 2012: Brad Keselowski's win marked the last win for Dodge. 2020: Race shortened to due to schedule changes resulting from the COVID-19 pandemic. Multiple winners (drivers) Multiple winners (teams) Manufacturer wins Notable races 1971: Bobby Allison dominated the race until a lug bolt broke on a pit stop, putting Richard Petty into the lead in the final 100 laps en route to the win. 1975: Richard Petty put the entire field two laps down until at Lap 350 he ran over debris from a backmarker's blown engine that broke a tie rod. Petty spent eight laps in the pits getting a new tie rod and came out six laps down. While Lennie Pond blew his engine Petty erased all six laps, but needed a late yellow when Buddy Arrington stopped on the track with fifteen to go. Petty breezed to the win, leaving runner-up Dick Brooks angry at Arrington, who'd recently purchased a transporter from Petty Enterprises: "I guess Arrington needed that truck paid for." 1976: Cale Yarborough lost two laps on two separate occasions and made them up en route to the win. 1977: Benny Parsons dominated the race after Lap 250. 1978: Bobby Allison won after a recent visit to the Mayo Clinic for a checkup. 1979: Richard Petty, Donnie Allison, and Cale Yarborough battled over the final 30 laps; Petty edged Allison by a hood at the stripe. 1980: Darrell