From the Super Mario Wiki
The Red Streamliner is a kart that appears in Mario Kart Tour. It is a red variant of the Streamliner and is classified as a tour-exclusive Super kart. Like with the Mach 8, Poltergust 4000, Royale, and Streamliner, slipstreaming lasts longer and yield more points when using this kart. The Red Streamliner could be unlocked during the Holiday Tour, where it was part of a Tour Gift for Gold Pass members after getting 152 Grand Stars. Also like the Streamliner, the emblem is located on the hood, sides, and engine block and it uses the Standard tires from Mario Kart 8 and Mario Kart 8 Deluxe.
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