After eventually fitting the downpipe I can report back that it's a poor fit.
The downpipe is the one with the dummy cat on it and it is literally 2mm away from the chassis and that 2mm took some work. I have a feeling it won't be long that it's knocking on the chassis.
I guess I could take it off and modify the shape of the cat (hit it with a big hammer) or I could take it off and throw it in the bin!
Sort of wish I didn't bother, actually I do wish I didn't bother!
I imagine the one without the cat fits just fine.
Should say this is on my 90 rather than the D2 but it's the same pipe anyway.