Assuming those set during lockdown don't count.
The legendary Cannonball run has been around since 1933 when Erwin "Cannonball" Baker completed the 2,825-mile run from New York's Red Ball Garage to California's Portofino Hotel & Marina in Redondo Beach in 53.5 hours. Ever since then, the record has been tumbling down, and in the last two years, record after record has been set. Driving at legal speeds, the trip should take about 40 hours, but those gunning for the cannonball record do it in the 26-hour range. With Covid-19 lockdowns affecting the US, the cannonball has been completed in record time, but that time doesn't reflect true world conditions. Now a new record time has been set under normal conditions, and it's pretty insane.
Back in 2019, the record was pinned at 27 hours and 25 minutes by Arne Toman, Doug Tabbutt, and spotter Berkley Chadwick in a 2015 Mercedes-AMG E63 sedan. The record was trounced once again in April this year by a mysterious driver piloting an Audi A8. The time was now set at 26 hours, 38 minutes - 45 minutes faster than the previous record, but suffered some criticism due to the fact that Covid-19 restrictions made it easier to avoid cops and traffic. Finally, Toman and Tabbutt hit a 25-hour, 39-minute Cannonball Run in their 2016 Audi S6. Records were also set for the solo record, the diesel record, and the coast-to-coast-to-coast record.
As reported on by YouTube channel Tedward, the new record, under normal driving conditions, stands at 25 hours and 57 minutes and was set in a 2019 BMW M5 Competition in October. The car was modified with a high-tech police scanner, lots of LED lighting, a reserve 60-gallon fuel tank, and all the badges were removed from the car to make it more difficult to identify. This M5 has also seen some engine tuning and a cooling system upgrade. The 2019 BMW M5 Competition produces 625 horsepower and 553 lb-ft in stock form. According to Tedward, the only reason the M5 lost out on the record was because of a hostage situation that shut off a section of highway in California. Whether or not this run is recognized as the new record or not, it's an incredible achievement.