What is the MAX HP for the Mitsubishi Lancer Evolution '05 and '07?

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Like the title says, I am wondering what is the max horsepower for the following cars.

618 Mitsubishi Lancer Evolution IX 　GSR '05

620 Mitsubishi Lancer Evolution X 　GSR Premium Package '07

Also, which is better overall?

Thanks.

 

[screwloose45]

I have the '618 Mitsubishi Lancer Evolution IX 　GSR '05' maxed out at 518 HP.