I'll amit that I don't know that much about building for high hp but if you are trying to more than double the hp from stock I would make sure the bottom end is order. I mean the 7mgte came stock with 220hp at the crank, so 450hp at the wheels is alot when you account for a 15% power loss for the drivetrain . And when I did my hg I realized how little is left to pull the motor once the head is off.
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