From the Super Mario Wiki, the Mario encyclopedia
The Circuit Special is a kart in the Mario Kart series. The kart resembles a Formula One car with headlights and wheels attached to the front wing. It specifically resembles the one seen in F-1 Race, a Nintendo game on the Famicom and Game Boy. It also looks similar to the Sprinter from Mario Kart Wii. In fact, its Dutch name is the Sprinter 2.0, making it a successor to the Sprinter, as well as the B Dasher, which is called "Sprinter" in Dutch. Its Russian name also means Sprinter when transliterated to English. The emblem is located on the hood.
Mario Kart 8 / Mario Kart 8 Deluxe
The Circuit Special debuts in Mario Kart 8 as an unlockable kart body. It offers a speed and weight boost, but it hinders in acceleration and especially traction; it shares its stats with the Sports Coupe, Mach 8, B Dasher, P-Wing, and Gold Standard. It shares the same sound with the Sports Coupe and is one of the few vehicles in the game to have a supercharged engine, along with the aforementioned karts.
In Mario Kart 8 Deluxe, the Circuit Special is available from the start. CPU Bowser, Wario, Roy, and King Boo occasionally use this body during races, with Bowser using the Monster tires, and King Boo using the Standard tires, respectively. Pink Gold Peach uses the body with the Sponge tires instead. CPU Lemmy and Luigi are also seen using this kart body, with Lemmy using the Standard tires and Luigi using the Slick tires with the MKTV Parafoil instead. The Circuit Special now only shares stats with the B Dasher and the P-Wing, boosting speed and weight while lowering acceleration, handling, and traction.
The Circuit Special has four different varnish colors. They are similar to the Sport Bike.
Mario Kart Tour
The Circuit Special returns as a kart in Mario Kart Tour, where it is classified as a High-End kart. Here, it uses the Slick tires from Mario Kart 8 and Mario Kart 8 Deluxe. Unlike previous appearances, it only appears with a blue and white varnish, regardless of the driver. This is due to the fact that the black, purple, and yellow varnish and the green varnish are reserved to two variants of the kart called the Black Circuit and Green Circuit, respectively, which are also classified as High-End karts. The Circuit Special increases the duration of slipstreams and the points earned form performing one.
Mario Kart 8
Mario Kart 8 Deluxe
Mario Kart Tour
Names in other languages