hi guys and gals, recently purchased my new car, nissan 200sx 2.0l turbo, my question is , i have to drive auto so question is if i put an upgraded dump valve on my car will it pssshhhh n tsshhhhh right being that its auto, or will it sound naf???? replies muchly appreciated, asking this question as a m8 of mine thinks it wont sound right?? cheers joshy