Alu radio plate mounts allow more solid radio plate mounting while reducing the potential for stripped threads. Newly-updated alu appears allow small throttle servo to be mounted in radio plate, and center gear to be more exactly tensioned. Kept alu stay enables tighter belt tension adjustment. Ultra-strong construction for long lifespan and durability in even the many extreme race conditions. CNC-machined from premium Swiss 7075 T6 aluminum. Group of 2 pieces (left & right).