Q: Why are adjustable camber arms part of a lowering kit?

Because lowering changes suspension geometry and typically piles on rear negative camber. A little improves stability, but too much wears the inside edge of your tires fast. The adjustable rear camber arms give your alignment shop the room to bring camber back to a tire-friendly target while keeping the handling sharp. That’s the difference between a stance that looks good now and one you can daily for years without early tire replacement.