What are cars called that look stock but have lots of performance modifications in Japan? Americans call them Sleepers


What are cars called that look stock but have lots of performance
modifications in Japan? Americans call them Sleepers.




チューニングカー (from "tuning car") or チューンドカー (from "tuned car").

From [JMdict / EDICT](https://www.edrdg.org/wiki/index.php/JMdict-
EDICT_Dictionary_Project) (edict2u) dictionary:

> チューニングカー;チューンドカー /(n) tuned car/modified car/EntL2831780/

