Yokomo Y2-302ARB Aluminum rear bulk head (R) for SD2.0 橫崛  [Y2-302ARB]

This is actually the right component pertaining to aluminum back bulkhead for SD2.0.
By changing the mounting location through the countertop gear and engine, you must use either a 3-gear specification for steering faculties or a 4-gear specification for emphasizing rear traction.

Supported Chassis
SDR-020 / SDR-020P / SDR-020R