Im a bit confused when doing some research for this, what is exactly needed for this to work? I take its not just the discs right? What about the calipers, and other bits and bobs?

Yep you'll need the 312mm discs the matching calipers, pads and carriers.

If available the TT hoses are a little longer and give a little more freedom of movement.

When fitting you'll also need some new brake fluid.

Search and ye shall find...

http://www.briskoda.net/forums/technical-guides/312mm-brakes-pictorial/47673/

im looking at this one for sale anyways

http://www.briskoda.net/forums/items-sale/tt-front-brake-upgrade-zimmermann-cross-drilled-discs/90466/

so i take it all i need then is longer TT brake hoses, and carriers? Standard vRS pads will be sufficient yeah?

You dont need the TT brake hoses, some consider it better to fit them if you have them.

I think the standard 312mm Pads are fine. As Ross says you don't 'need' the hoses.

i think this might be what your looking for

Complete 312mm Front Brake Conversion for the Mk4 Golf - eBay Volkswagen, Car Parts, Cars, Parts Vehicles (end time 27-Oct-07 16:58:28 BST)