Valved mufflers on a "S" ?
We all know the GTS has valved mufflers, but a couple people with S's (from another thread) are sure they have valved mufflers on theirs. My 2011 does not.
So what does your S have?
Were they an option?
The wiki says this:
'The Quattroporte Sport GTS 4.7L V8 has a maximum power output of 440 PS, ten more than the Quattroporte S, owing to a revised intake and a sport exhaust system with electronically actuated bypass valves.'
2011 Quattroporte S, 1987 425i biturbo