So you were having buyers remorse because you bought an automatic, and you were thinking about trading it in for a manual. Now you want to slap on 400 horses, which runs the risk of blowing the engine, and brings the possibility of unnecessary costs if shit goes wrong.
I think you should trade in the car for a different (faster?) car. All this that you want to do does not make much sense. But hey at the end of the day it's your money. Good luck
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