When the diesel TTiD (180bhp) was launched, it was as an Aero only and came only with twin exhausts, think this was 2006/2007.
The other 2 diesel variants TiD (120bhp) and TiD (150bhp) had hidden exhausts.
The Aero V6 petrol has always had visible dual exhausts
The Aero 2.0T petrol always had single sided visible exhausts.
This seems to have changed around 2008, I've noticed that the sportwagon and convertible (Aero 2.0T) seemed to lose it visible exhaust but the saloon kept a visible exhaust, maybe this is what happened to the TTiDs as well
The other 2 diesel variants TiD (120bhp) and TiD (150bhp) had hidden exhausts.
The Aero V6 petrol has always had visible dual exhausts
The Aero 2.0T petrol always had single sided visible exhausts.
This seems to have changed around 2008, I've noticed that the sportwagon and convertible (Aero 2.0T) seemed to lose it visible exhaust but the saloon kept a visible exhaust, maybe this is what happened to the TTiDs as well





