2021 Petit Le Mans

It was the eighth consecutive year it was part of the IMSA SCC, and 24th Petit Le Mans.

[3] The 2021 edition underwent a date change of its own, being postponed from its traditional early-October spot to the weekend of November 13th.

[4] The event featured support from four of IMSA's supporting series; the Michelin Pilot Challenge, IMSA Prototype Challenge, Porsche Carrera Cup North America, and Mazda MX-5 Cup.

[5] On November 3, 2021, IMSA released the latest technical bulletin outlining Balance of Performance for the event.

[6] In GTLM, the Chevrolet Corvette C8.R received a one-liter reduction in fuel capacity, while in GTD the 2021 debut of the McLaren required its addition to the BoP table.

[9] In LMP2, Mikkel Jensen and Ben Keating led the Drivers' Championship with 1807 points, ahead of Tristan Nunez and Steven Thomas.

[9] With 2938 points, the GTD Drivers' Championship was led by Zacharie Robichon and Laurens Vanthoor, ahead of Madison Snow and Bryan Sellers.

In DPi, the expected addition of the Endurance Cup effort from Ally Cadillac Racing was present, while Hélio Castroneves replaced Olivier Pla as Meyer Shank Racing's third driver.

[10] In LMP2, United Autosports returned to complete their scheduled Endurance Cup campaign.

LMP3 saw its largest grid of the season with ten cars, which included a series debut for FastMD Racing.

[11] Returns for United Autosports, Forty7 Motorsports, Jr III Racing (whose lineup included former IndyCar driver Spencer Pigot),[12] and WIN Autosport[13] helped to boost the class to its record-breaking entry number.

GTD also featured a number of changes, including the first appearance of the season for the McLaren 720S GT3, fielded by Inception Racing.

[19] The first practice session took place at 9:20 am ET on Thursday and ended with Felipe Nasr topping the charts for Whelen Engineering Racing, with a lap time of 1:09.508, ahead of the No.

55 Mazda RT24-P of Jonathan Bomarito stopped at turn eight due to a mechanical issue.

[20] The second practice session took place at 2:20 pm ET on Thursday and ended with Harry Tincknell topping the charts for Mazda Motorsports, with a lap time of 1:09.356, 0.044 seconds faster than Felipe Nasr's No.

8 Oreca of John Farano collided with Jan Heylen's Porsche at turn twelve and brought out the first red flag.

36 Andretti Autosport Ligier JS P320 of Oliver Askew stopped on track resulting in the sessions second red flag.

[25] The third and final practice session took place at 6:30 pm ET on Thursday and ended with Tristan Vautier topping the charts for JDC-Mustang Sampling Racing, with a lap time of 1:10.796, ahead of The No.

2 car for United Autosports, besting Rasmus Lindh in the Performance Tech Motorsports entry.

31 car for Whelen Engineering Racing, beating Harry Tincknell in the Mazda Motorsports entry.

[43] Antonio García and Jordan Taylor took the GTLM Drivers' Championship with 3549 points.