Answer
The IMSA WeatherTech SportsCar Championship title in 2021 was secured by the pairing of Brazilian drivers Pipo Derani and Felipe Nasr, racing for Action Express Racing's #31 Cadillac DPi-V.R. Throughout the season, Derani and Nasr displayed consistent performances, showcasing their abilities to deliver remarkable speed and strategic driving, Ultimately, their collaborative efforts and unwavering determination led them to claim the prestigious IMSA title that year.