In an interview with Twinfinite, Dragon Ball Z: Kakarot producer Ryosuke Hara confirmed there's more to Goku's car's appearance than meets the eye. After acquiring Goku's driver license ...

This means all of his Gi uniforms are dyed differently, and one of them matches the outfit which Goku wears at the end of Dragon Ball Z. Yes, that a Gi… you know the one we are talking about.