Am thinking about purchasing one of these

Does anybody know anything about these? I'm new to turbo cars but wouldn't mind a bit of woosh noise (a little lame I know). The site says that it has a stealth setting if you get sick of the sound.
Will this effect the cars performance (+ or -)?
Does anybody know anything about these? I'm new to turbo cars but wouldn't mind a bit of woosh noise (a little lame I know). The site says that it has a stealth setting if you get sick of the sound.
Will this effect the cars performance (+ or -)?


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