Name:Multi-Track for their combined form
Individually they are known as: Blast pipe, Gage, Wheelclimb, and Highball
Gender: Male 
Height: As tall as a two story house
Alliance: Autobots
Disguise Type: Bullet Train
[img=http://img4.wikia.nocookie.net/__cb20120402103220/kamenrider/images/e/ef/Den-O_Trains.jpg]
Appearance: 
Holographic Human: none
Weapons: Depending on the personality in charge: Sword, stave, axe, or gun
Personality: Blast pipe is the one who acts like he's the one in charge. He's hotheaded and brash and goofily obsessed with making a good entrance. 
Gage is the foil to blast pipe being of more a cool sneaky and smooth talking persuasion who annoys Blast pipe
Wheelclimb is the token big guy who's also a sleepy gentle giant sort
Highball is the youngest and the fun loving sort who likes to goof off when there isn't anything important going off

Background: Before the war of the decepticons and autobots reached even touched their homeplanet of Velocitron. Velocitron itself was a fairly peaceful and neutral planet home to an odd group of cybertronians that dedicated themselves to the art of speed and racing was their culture. Originally a team of smaller racers that raced as one before the war. Now they and other Velocitronians were forced to choose sides as the conflict ravaged their world. Joining the autobots as they seemed more likeable, they now find themselves wondering how help end this war and go back home while they squabble amongst themselves. 
Other:

Side Note: