Supersprint backbox

Quick exhaust question, hoping someone can help … I need a new backbox and I'd like to upgrade to stainless but I don't fancy spending out on a full system. I'm looking at supersprint: 
http://www.supersprint.com/en/IT/prod-c-7074-6561-9313-vw_golf_i_gti_18__82F_82_E28093E280BA_112F_83.aspx
And wondered if this would fit on a standard mid section? 
Any help much appreciated  

Try e-mailing a suppler and asking, I'm sure they will be able to help.

Thank you by the way! I did exactly that. Emailed via the supersprint website, the guy was spot on. He answered a lot of questions and even had me sending photos of my current exhaust to make sure he got the new one exactly right! 
I ended up with the 60mm system using my existing manifold and I love it! Looks smart it's really good quality and it's not overly noisy, highly recommended!