Porsche capped off the 2025 IMSA WeatherTech SportsCar Championship season with six championship crowns. The factory team’s two Porsche 963 prototypes finished the season finale at Road Atlanta in third and tenth place, enough to secure the manufacturers title once again.Porsche capped off the 2025 IMSA WeatherTech SportsCar Championship season with six championship crowns. The factory team’s two Porsche 963 prototypes finished the season finale at Road Atlanta in third and tenth place, enough to secure the manufacturers title once again.