Hi Mike, I had the the same car and diffuser. I had the standard
Cupra R exhaust fitted but the diameter of the pipe on the
Cupra R is larger than the TDI. So I had to have my
Cupra R back box pipe adapted to fit. I'm sorry I forget the sizes but it was something like 2.75" vs 2.5" maybe.Not massive.
If you're getting a full system you may need to check the difference in the connection of the cat back of the TDI vs the
Cupra R. The
Cupra R system is likely to be bigger further forward too, so it'll need some kind of adaptor to create a step in the system.
Also I found the
Cupra R back box just as quiet as the standard TDI back box, so look at getting a loud
Cupra R system too.
Only pictures I have lol
Oh and Scorpion over Miltek