Here’s a strong, well-regarded piece of car physics for Unity, openly available on GitHub:
Repo Link: (Search ArcadeCarPhysics on GitHub)
Stars: ~400 car physics unity github
Tire Friction Models: High-end projects usually use the Pacejka Magic Formula to simulate how tires grip the road during cornering and acceleration. Here’s a strong, well-regarded piece of car physics
github.com/zigurous/unity-2d-car-tutorial