400-500 Hp!!! Not going to happen. EVER! Even with an engine swap to a 3.4L you still won't get that AT the flywheel/wheels. It's just not very realistic. Your best bet to get more power is either a turbo, supercharger or an engine swap. And you may be able to get into the 300 Hp range if you modify it on top of that. :dance:
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