GTRS4 sounds like a Porsche or Nissan GTR. But it’s Vorsteiner’s GTRS4 BMW M4. Widebody kits are becoming a huge trend these days with Liberty Walk’s Aventador, 458, Nissan GTR, Scion FR-S, and BMW’s.
Here is Vorsteiner’s more clean widebody kit. It looks awkward being that extremely wide like the airflow is compromised and obviously the turning radius is compromised.
In depth look at a stock BMW M4.