S+ Tier

Legendary V8 Engine BlockEngine HeartLegendary V8 Engine Block is the rarest engine part in the game. With a 1% drop rate, players statistically need to open ~100 containers to secure one. It is the single highest-impact part for auction value.Mythical TurbochargerForced InductionMythical Turbocharger is the apex forced-induction part. It is the only Mythical-tier part in the current build and represents the absolute ceiling of the Tuning Shop upgrade system.

S Tier

Epic Twin-Turbo KitMid-Game EngineEpic Twin-Turbo Kit is the first forced-induction part that meaningfully scales auction value. Available from Tier 3 containers and raid chests, it is the workhorse part for the mid-game transition.

A Tier

Rare Suspension ModuleHandlingRare Suspension Module is the first part that opens up the handling meta. Required for the Apex GT and other mid-game sports cars.

B Tier

Uncommon Brake SetStarter TuningUncommon Brake Set is the first brake part that materially affects auction value. Most players accumulate dozens of these in early-game container openings.

C Tier

Common Engine BlockStarterCommon Engine Block is the engine part of every starter car. Available in massive surplus from playtime crates, it has the lowest auction value impact but is essential for the first sessions.