Forza Motorsport finally goes on sale this fall, more than three years after the game’s 4K / 60 fps graphics and ray-tracing light effects were first teased, and Cadillac and Corvette share top billing in the cast list.

The racing sim will be released on Xbox and PC on October 10 and both the Cadillac V Series.R LMDh endurance racer and Corvette E-Ray hybrid will be available to gamers thanks to a tie-up with General Motors. The game will feature more than 500 vehicles and 20 different environments.

Forza Motorsport is the track-based serious racing yin to the go-anywhere, open-world yang that is Forza Horizon, and to make sure the Caddy and Corvette sound and handle on the game’s virtual circuits exactly how they would on the real thing, Forza’s programmers at Turn 10 Studios secured early access to the cars more than a year before the rest of the world had officially seen them.

Related: New Forza Motorsport To Launch With Over 500 Vehicles

GM invited the game team to collect detailed photographs of both cars, record genuine audio from development vehicles and also access performance data from engineers so they could accurately model the handling characteristics.

Cadillac V Series.Rs finished third and fourth at this weekend’s Le Mans 24 Hours behind cars from second-place Toyota Gazoo Racing and Ferrari, which won the event outright in its first attempt for half a century. While the Ferrari and Toyota both feature turbocharged V6 engines, the Cadillac is equipped with a naturally aspirated, DOHC 5.5-liter V8 that’s boosted by a Bosch hybrid unit.

The Corvette E-Ray also runs an electrically assisted, naturally aspirated V8, though in the C8’s case it’s a 6.2-liter pushrod V8, and the hybrid unit drives the front wheels, making the E-Ray the first production all-wheel drive Corvette in the model’s 70-year history.

The E-Ray’s LT2 V8 is the same 495 hp (502 PS) unit fitted to base C8s, but the addition of the hybrid pack lifts total system power to 655 hp (664 PS), which is only just shy of the 670 hp (679 PS) served up by the high-revving Corvette Z06.