SNES Racing games on the Super Nintendo are a bit of a mixed bag. There’s the obvious choices like Super Mario Kart, F-Zero, Top Gear or Rock and Roll Racing. But then it goes downhill fast. You got Stunt Race FX which is has a god awful framerate and slowdown.
Then there’s Uniracers which I guess is a racing game? I don’t know it’s unicycles for crying out loud! If you’re looking for something that mimics Gran Turismo on the Playstation, meet F1 Roc II.