Let The Loud Sounds Of The Ferrari F12 Transport You To Aural HeavenTravis Okulski4/02/14 12:40pm881EditInvite manuallyPromoteDismissUndismissHide The Ferrari F12 has butterfly valves in the exhaust that makes it quiet at lower revs, loud when you open it up. But what happens if you take that valve out? All loud. All the time. Eargasm.