Hi is the 312 upgrade just front calipers or the rears as well?

Or do you just upgrade the fronts as it's suffice?

Cheers

a 312mm brake upgrade is just the fronts, as you change the front calipers, carriers to accomodate 312mm discs and pads to suit, the standard discs are only 288mm

There is an upgrade for the rears as well but very few people bother with it as most of the braking is done up front.

Ok thanks guys.

Check out the Fabia 1 thread, there should be a 'How To' Guide that i found very good when doing mine.