// Wheel.cs

public class Wheel : MonoBehaviour
{
    [Range(0, 1)]
    public float forwardFriction = 1;
    public float sidewaysFriction = 1;
}


// Assist.cs

public class VehicleAssist : MonoBehaviour
{
    void Start()
    {
        <...>
    }

    void FixedUpdate()
    {
        if (drift)
        {
            var wheels = GameObject.FindGameObjectsWithTag("wheels");

            foreach (var wheel in wheels)
            {
                wheel.GetComponent<Wheel>().sidewaysFriction = 9f;
                wheel.GetComponent<Wheel>().forwardFriction = 5f;
            }
        }
    }
}