Railspike

Railspike is an Autobot train. Railspike is the grizzled leader of the Team Bullet Train. He is courageous and polite, and his intelligence makes him akin to any battlefield situation. He tends to act as a peacekeeper when tempers get out of hand. Despite his apparent age, Railspike is still able to take on his enemies with incredible efficiency and skill. Railspike transforms to a 500 Series Shinkansen Nozomi bullet train engine. He is equipped with rocket launchers in his shoulders, and is capable of generating ultrasonic waves, powerful enough to take down his targets in one hit. He also fires Reflector Mines which can send an opponents attack right back at them.

He forms the upper body, arms and head of Rail Racer. (From Wikipedia)