I'm going down the route of looking at changing my rear silencer once I've put my FR rear apron on. Reading and looking at the pictures recently on SE, I'd rather go for twin pipes. Looking at Miltek's site the MK4 is oval, but the Skoda Vrs is twin - Will this silencer fit, considering they use the same floor pan - or don't they?

In theory they should fit, your best bet would be to ask Milteck as they could easily make one for you

And you wont be able to fit just the rear silencer as the bores of the system are different.

But the Fabia vRS system will fit straight on, its what Andy has on his Ibiza Sport.