To grasp the importance of this specific identifier, it helps to break down its nomenclature:
At 150 mph, the YVM Daphne AS4 generates over —more than its own curb weight (1,450 kg dry). In theory, it could drive upside down in a tunnel, though YVM’s CEO jokingly said, "We don’t recommend testing that." yvm daphne AS4
The YVM Daphne implementation focuses on high-performance eDelivery AS4 profiles : To grasp the importance of this specific identifier,