This is the XRAY XB2 Graphite 1-Slot Steering Block Extension.
Steering block graphite extension, works on either left or right side. Allows for easy Ackermann position adjustment for fine-tuning on all surfaces and track conditions. 1-slot extension gives racing characteristics between 2 & 0 slots: slightly more steering then 2 slot, turns outside wheel more. On high-grip this can produce a stopping in corners.
