The Supersonic Fury Add-on for Rocket League has 6 achievements.
Win a Season Championship using Dominus or Takumi in every game
Perform a 180 powerslide with both the Cristiano and Spinner Wheels
Use the Burnout or Nitrous Rocket Boost for a total of 10 minutes
Drive 10 km with either the Cristiano or Spinner Wheels
Equip both Dominus and Takumi with a new Decal and Paint Finish, then win a game
Play a complete game with both Dominus and Takumi