So, is the car left hand drive? But then the exhaust pic looks RHD.
??
The exhaust is on the right hand side of the engine regardless of whether the car is LHD or RHD. I think the steering setup and the dash are the only things that change. Perhaps the headlights too, but not necessarily as some types are simply adjusted for LHD or RHD.
As it's post cat, it shouldn't affect the ecu.
I wouldn't be sure about that. Back pressure, or lack of it, can have a big effect on the mixture requirements. To a degree the ECU will compensate using the sonda lambda feedback loop but the this will have limits to the maximum rich or lean adjustment available.
