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why do you think its so easy to make 300 hp no matter where you are in the world because the the 335i automatically tunes to achieve this goal i pretty sure when you take a subie into the mountains it loses some power. and in the end its up to the user do want to control everything in the engine or do you want to let the ecu you some of the work i rather take full control when your running 7psi more then factory intended
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