The mk1 formentor already has a pure engine sound mode, not sure about the cupra leon cos my leon is the mk3 290, i suspect the more powerful models will have this also
Comfort = exhaust flaps closed
Sport = exhaust flaps open, 40% soundcktor
CUPRA = exhaust flaps open, 100% soundaktor
Pure should be exhaust flaps open, 0% soundaktor
I have the perception that CUPRA mode also produces louder pops/bangs than Sport mode.