ISUK:

It's easy to avoid making any extrovert noise in the 458 when driving through a town. You only have to put the manettino in sport mode and the exhaust valves will stay closed within the rev range needed at lower speeds. If you hear one driving through town it's because the driver has set the manettino to race mode to open the valves earlier. With the valves shut the exhaust is actually pretty quiet for this type of car.

So true. Quite quiet in sport, especially compared to a scud which roars in sport