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Regarding the tune can you explain to me how its down? and are there side effects from it?
thanks
Tuning is just changing the way your car drives. It can even give you better mileage and a sportier feel when driving. Take it to a local shop they can give you more details about it
does the guy have to be a professional in tuning because I heard that bad tuning can harm the engine. Also I heard that the G37s is "sensitive" when it comes to tuning.