10% of the pieces in a Ferrari are inspected using x-rays. This ensures the motor has no defects, the bad pieces are melted again[0]. X-raying does not cost a l

10% of the pieces in a Ferrari are inspected using x-rays. This ensures the motor has no defects, the bad pieces are melted again[0]. X-raying does not cost a lot nowadays and definitely helps the quality. [0]: https://www.evo.co.uk/ferrari/10140/making-of-a-ferrari https://www.evo.co.uk/ferrari/10140/making-of-a-ferrari