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    Quick question on Granturismo exhaust differences

    Hey a quick question for you GTS owners. My exhaust valves are open all the time because I have disconnected the vaccum hoses. However I note that it is always much louder when I cold start. I want it like that all the time as it sounds epic. But after 30 seconds or so it reverts back to the...
  2. S

    Quick question on Granturismo exhaust differences

    My 2016 GTS is an Auto and it has the single oval pipes each side. I disconnect the vacuum hose on each muffler and the valve stays open all the time :D