Each car has a Star rating. The more Stars the better, and the maximum rarity available is six stars. The more stars a car has, the higher the Performance Points rating, and the more upgrades and augments can be installed.

Tier D and C cars start at 1 star and can be fused to 3 stars.

Tier B cars start at 2 stars and can be fused twice to reach 4 stars.

Tier A cars start at 3 stars and can be fused twice to reach 5 stars.

Tier S cars start at 4 stars and can be fused twice to reach 6 stars.