Mitsubishi Lancer Evo Evolution X

Mitsubishi Lancer Evo Evolution X - One of the homes in America are quite popular modification AMS performace (AMSP) has memermak Mitsubishi Lancer Evo X, which later changed its name to Mitsubishi AMS 900X. In terms of appearance no one extreme to the body, except the use of rear wing and front spoiler are frightening.So, why is number 900? What does he mean? This figure indicates that the Evo X