Graphite servo saver for Semi-Split Bulkhead. The servo saver features conical spring which much longer and stronger. The conical springtime helps you to absorbs more power from track or crash. Makes driving easier on bumpy tracks. The servo saver posts feature a locking system that ensures the servo saver setting will not change while running. To ensure servo saver reliability, the servo saver components are moulded from graphite material which is more resistant and efficient in dusty conditions.