When it comes to performance vehicles, you can break them up into 3 categories-Tuners, Muscle, and Exotics. Tuner cars tend to have different upgrade options in performance mods and visual mods(Usually run some form of a 4 cylinder motor).Muscle cars tend to go by the idea that bigger is better and go with high liter N/A V8 motors(5.0,5.6,5.7,6.0,6.6 Liters) or supercharged V8 motors with huge blowers above the hood. Exotics usually have high revving high HP motors that are less liters than muscle cars(like a 3.9L Ferrari V8). Exotics usually are 8 cylinder, 10 cylinder, or 12 cylinder. That's my view on the subject. Take any of that information with a grain of salt.Why is it, that they call them tuner cars?