Forza has pit stops but in past games i'm pretty sure the only time you would pit was during the endurance races. I haven't played Forza 4 a whole lot yet but I have not had to pit in a race yet. I alway wonder why they don't make it where you can set the number of laps for each race. It would be really cool if you could set the fuel and tire wear to like 4x like the F1 games, then do like a 8 lap race and pit once.