Fiesta zetec s (mk5) front brakes on sierra hub

[Eddy]

Hi guys,

I've had a quick search and couldn't find anything definitive.

Yesterday, I helped a friend of mine upgrade the front brakes on his mk5 fiesta zetec s track car to the mk6 fiesta st 280mm set up.

This has left spare the zetec s 260mm calipers and carriers, which my mate let me have gor helping out.

The question is, will these fit straight on to the sierra hubs? Are any spacers or alternative discs required?

Is it likely to be a worthwhile upgrade? The 260mm discs look so much more substantial than the 240s!

Cheers

Eddy