@S3Alex got you written all over it lol
I though the cat was the bit with like extra metal around it near the bottom?Isn't that the cat?
It does look a bit tight in there
Standard bore is 60mm with two cats - one right behind the turbo...What's the standard exhaust diameter out of interest? MM WISE?
It's all very tight but with careful application 90mm is possible
I think the separate dump tube would be feasable but without checking it's hard to say...