daisuke- it's up to you but 3x a year is hardly any track time... and what kind of speeds are you seeing at this track? chances are your stock wing will work just as well...(?)
so it will be only for appearance. it's your car so you do wat you want but from a performance stand point it's overkill.
i would work on your suspension and tire setup instead especially since you can get regular mountain driving time every weekend.
